I have not seen this adressed at all, but it's a huge problem. Most clan chat spammers use a technique called jumping. They type their message, then join, send it, and jump out, all within seconds. This makes it very hard for channel admins to kick them. THERE NEEDS TO BE A WAY FOR ADMINS TO BAN PEOPLE FROM THE CHAT WHEN THEY ARENT IN IT!!!!!!!! I know that makes little sense, but once u experience it, you'll know.