They do, just for some reason not effectively. Like, blocking the VoIP providers that allow scammers would dry all that up.
Weird thing is, this just drives more people to not use voice calls. They're killing their own racket. (Although long-term, likely phones will be all IP with no carrier-managed services.)
I need to re-figure out a way to filter keywords again. Wonder if any lemmy apps let you. Can use browser plugins on desktop though. May have to pay for Feedly or something.
Everyone should ignore these crazies. They feed on drama. No drama. No food.