I picked up on a couple of dodgy posts in one of my communities as they recycled one of my old posts! The best thing we can do is to downvote them to a low reputation so the accounts become useless. People can coordinate on Discord to do this.
Hive is vulnerable to abuse as accounts are really very cheap to create when you consider their potential value. Anyone with a decent stake can create loads more. I think the price will have to rise eventually.
Scammers mostly use Hive on Board to create new accounts as there is no security check.
No phone and email verification. You can create an account within 20 seconds.
Most of the abusive accounts past 2 years have been created with HOB.
The creator of it vanished a while ago and it is basically a rouge service now.