Hello julcnx,
Re 'I still don't understand why any inputs with the tags "tourism=viewpoint" or "tourism=camp_site" would be considered "spam."' unfortunately many maps.me users use these tags as personal bookmarks, and they don't actually reflect a real viewpoint or camp_site.  However, I'd suggest at least trying to contact the maps.me mapper, which doesn't seem to have happened here: https://resultmaps.neis-one.org/osm-discussion-comments?uid=5071262 .
Best Regards Andy, from the DWG
