Just keep reporting them, but there's an infestation of them for sure. It's times like these when I wish all new accounts were shadowbanned until their first post or so has been verified.

Globals can't do much either other than keep nuking them but we do have a tool to spot probable newbie alts now so that's helpful and we can pre-emptively nuke a lot of these but other than that people will just have to keep reporting them.