This changeset has been reverted fully or in part by changeset/59504601 where the changeset comment is: Delete bogus maps.me personal private info inappropriate spammage

This changeset has been reverted fully or in part by changeset/59504118 where the changeset comment is: Delete bogus maps.me personal private info inappropriate spammage

This changeset has been reverted fully or in part by changeset/59502074 where the changeset comment is: Delete bogus maps.me personal private info inappropriate spammage

This changeset has been reverted fully or in part by changeset/59501985 where the changeset comment is: Delete bogus maps.me personal private info inappropriate spammage

simple answer, maps.me.
more detailed response: #mapsme spam.
I'm leaving this and the nearby spammy nodes intact as potentially the address information from the names given could be useful.
Do I have a problem with maps.me? You bet. Visit Nepal, f'rinstance.

This changeset has been reverted fully or in part by changeset/59499620 where the changeset comment is: Delete spammy node positioned several kilometres away from actual location. OSM is a database of facts, not random misplaced business self-promotion.

This changeset has been reverted fully or in part by changeset/59479676 where the changeset comment is: Complete revert as source given in changeset consists of two absolutely not allowable sources for OSM data. Please react to comments others have made, and realise that Google is taboo, as is the bayern.de source you used.

Sorry for forgetting to follow-up until now...
If you haven't seen, the unwanted losses in my revert are not difficult to replicate.
You changed the access of the pool at housenumber 650 to private, plus at 5757 you added a new private pool that I deleted for speed, presently appearing or disappearing by zoomlevel at the lower left of the orange box seen on the map to the right in this changeset discussion.
If it's not trivial for you to repeat that work, I can restore your original changes.
However, as part of the learning process, I would suggest you take the opportunity to use a different background in iD than Bing here, in the hopes one will be clearer or better to re-draw your new pool. Without actually looking, my gut feeling is Mapbox will be a good choice.
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As far as iD which I still avoid using, I agree that from those times I have to start it, the points and lines are too prominent and distracting if I want to study the background.
You can try the `w' command for a Wireframe style to make the map data less distracting.
If you want to see another presentation of the neighbourhood node in the car park the way I would see it, and can risk it, the obsolete editor Potlatch presents such a node as probably a green dot, with other functions like address nodes as pale blue, and pointless nodes as grey.
Potlatch also has a Wireframe style in a pull-down menu that I almost prefer, dispensing with the pale coloured lines that can obscure the background, rendering them as simple black, and minimally sized green squares.
There are other styles that differ in subtle ways intended for a particular focus in editing.
Of course there are a lot of deficiencies these days in Potlatch, but I bring it up as an existing alternative to the iD user interface, although probably JOSM can do everything there and more.
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Anyway, sorry in my hurry to restore the address entrance nodes, that I undid your other work. If you really want, I can restore those changes, although the additional work to keep your history intact seems not worth the effort if, as I suspect, your second attempt to draw the pool from a different background is far superior to the original.
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By the way, the iD development occurs in a Github repository which is where an issue can be opened if you can suggest concrete improvements. Before you get too nvolved with that, note that iD is a frequent culprit in bad edits where nodes get pulled to places they should not be and joined where they should be separate, perhaps in part to the same prominence that led you to delete the nodes as unwanted, misplaced, or whatever, so I would suggest if you intend to keep contributing to OSM as I and all of us hope, that you invest quickly into learning JOSM before investing too much into iD or its improvement.
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Thanks for your contributions, and do not worry about having made mistakes, gave me something to do while de-scaling the loo as part of me OSM janitorial job.

This is not to answer for John, but to note that I have seen him actively discussing things in the HOT mailing list.
A quick check there shows he has commented not recently, but in March or so about the topics covered by recent changesets - untagged ways and badly-drawn buildings.
A more extensive discussion was carried out in Dec of 2017 about general HOT building quality.
That is not documentation as needed, but due to the scale and nature of HOT mapping, I don't know if such changesets should be seen as HOT internal bulk cleanups, where the data quality is simply too poor to salvage, and if that is the intent of this account, used for validation (I know nowt of HOT mapping other than quality can be ... um ...)
Other than removing doubly-mapped or outdated buildings, I can't trivially guess what could apply here. I'd love to see an achavi that also allows a more extensive selection of layers of aerials, so at a glance I can see what might have been the case here; there are no underlying building outlines here.
The HOT mailing list is quieter of late, so I do not know if these removals are discussed in a walled garden shielded from my prying eyes, that seem popular amongst the yoof of today, or anyone more hip than myself, printing OSM maps on an ASR-33 on horribly yellowed paper rolls.
(Or punch cards. Good for navigation by feel.)

This changeset has been reverted fully or in part by changeset/59429254 where the changeset comment is: Trivial revert. Welcome 1959er, what I guess you mean is a UX issue should be the editor-shows-all. I suspect if you view the map with different renderers, it may appear more as you expect.

This changeset has been reverted fully or in part by changeset/59428776 where the changeset comment is: Simple full revert by user request, address nodes deleted by mistake. Loses two additional changes seen in https://overpass-api.de/achavi/?changeset=59401756 . I will take a look at the second changeset and probably should have used Potlatch 1 here.

This changeset has been reverted fully or in part by changeset/59424594 where the changeset comment is: Delete bogus maps.me personal private info inappropriate spammage

This changeset has been reverted fully or in part by changeset/59423356 where the changeset comment is: Revert of repeated vandalism, turning a cemetary into a Pokemon park and hiding behind gibberish changeset description. User has been contacted by the DWG for ignoring these comments yet continues to mix malicious edits among others.

This changeset has been reverted fully or in part by changeset/59413768 where the changeset comment is: Delete bogus maps.me personal private info inappropriate spammage

This changeset has been reverted fully or in part by changeset/59413749 where the changeset comment is: Delete bogus maps.me personal private info inappropriate spammage

This changeset has been reverted fully or in part by changeset/59413668 where the changeset comment is: Delete bogus maps.me personal inappropriate spammage

This changeset has been reverted fully or in part by changeset/59413522 where the changeset comment is: Delete bogus maps.me personal inappropriate spammage

This changeset has been reverted fully or in part by changeset/59406366 where the changeset comment is: Delete bogus maps.me personal inappropriate spammage

This changeset has been reverted fully or in part by changeset/59404291 where the changeset comment is: Delete bogus maps.me personal inappropriate spammage

This changeset has been reverted fully or in part by changeset/59401889 where the changeset comment is: Delete bogus maps.me personal inappropriate spammage