text: From my analysis, this, and other similar areas seen elsewhere, appear to be the outcome of mapping parties with multiple participants (with too much time on their hands, but who am I to talk as I surf OSM for bug-reports).
  With time their results are improving, so it's not as if they are unable to learn.
  I don't know that I've seen any constructive feedback offered in changeset comments.
  Rather than revert, I'd be tempted to crash the party as an uninvited guest and fix things up, building upon their work, rather than shutting down the rave party.
  I tried to start on that in a better-mapped area (later commented by Mateusz) but didn't save my multipolygon cutouts for swimming pools before my editing session was killed, and some mis-tagged areas seemed not to cooperate.
  Work with these people, who want to add to the map in harmless ways, treat them as beginning learners rather than demanding perfection, help with their mistakes, and save the reverts for the fake Pokemon GO lakes and parks now flooding the map and taking over residential neighbourhoods.
  My opinion, my observation.
  In an earlier bug-report conversation with Adamant1, I described these mapping parties, probably failing to mention the peals of laughter I later heard that night as I walked through an area, eyes caught by still-up holiday lights at an obvious social gathering, thinking, as I've never participated in social mapping (being anti-social meself), wow, maybe this is a mapping party I'm overhearing, and missing out on...
  Or maybe it's people just having fun, with better drinks than my freebeer.
  Viewing the aerial imagery, I'm amazed they can get so much detail out of such bad backgrounds, as there's no zoomlevel 22 orthos in these areas.
  That said, BANHAMMER TIME, NUKE IT WITH FIRE