See the discussion on https://www.openstreetmap.org/changeset/169357242 .  I'm already working on reverting the "5TDGBRCH4MS037831" spam in all of unknown246's changesets.  But I'm a relatively junior user; if DWG wants to take this over and has better tools, go for it.  Is there a better place to put a notice so other mappers don't inquire on more individual changesets?