I'm not too surprised if blocks aren't working. These creeps try all sorts of tricks to get around that. Something needs to be done by the administration. I saw that there has been a problem with account hacks, and the spammers seem to be using legitimate characters to do their spamming, which has me wondering whether they're also using compromised accounts. Recent examples include characters called:
Krimos
Strickylol
Imadb
Garradon (level 60!)