The moderators can send the threads to "To Be Deleted" and ban the spammer, but the username and IP are still on the books. When I come on I usually ban the IP then delete the username. But it really doesn't matter, as they just come back with new usernames and IPs. I've sent Josh an email asking if there's a way to set our anti-spam program to recognize Chinese writing and have those threads "moderated" so they don't show up on the General population, but haven't heard back from him yet.