After some additional discussion, we've come to decide not to do thread bannings after a thread is started. That means if you want to have anyone banned from your threads, you need to do it up front when you first create a thread. The only exception to this would probably be if someone made a sock puppet account to try and get around the ban.
The reason for this is to prevent people from deciding mid-argument to kick someone out just because they are disagreeing with them. You should know before starting the thread who are the true assholes vs. people that might just make you roll your eyes.
The reason for this is to prevent people from deciding mid-argument to kick someone out just because they are disagreeing with them. You should know before starting the thread who are the true assholes vs. people that might just make you roll your eyes.