I've ran a Teamspeak server for the past few years and there are a few people who give me grief fairly often. I've got a lot of people who help me with managing the server but there are a few things we simply have no idea how to combat. We've upgraded our server's DDoS protection and that has helped but we cannot figure out how to stop this guy from spamming loud noises in our AFK channel (no one but him can speak there) and he's able to make our client crash. It seems he has to join our channel in order to do this.

Is he running a hacked client? Is there anything that can be done or are we just going to have to wait until he get's bored?