FYI there was an incident where the Democracy Monument was renamed to “Nefarious Populace Monument” and appeared in the Grab App
Apparently this has been rectified, but I’m about to contact the Data Working Group anyway just in case there has been some more vandalism by that user.
Andy from the DWG here. Apparently the user deleted their account and the username now appears as “user_18762857”. The number there is the userid, which stays the same when a user renames their account (or deletes it). A search data last edited by that user is therefore https://overpass-turbo.eu/s/1t3M and when I run it it confirms that there is nothing left.