[retsam]

I dont know if its appropriate for this plugin, since there already is a plugin that handles this but... for an idea, you could put a simple block that kicks players doing the unassigned team exploit as well. That one actually will crash your server.

Like I said, there already is a solo plugin that does it with many options so, maybe its not necessary. Might be nice for an all-in-one solution plugin that covers all exploits though..