Rather than going straight for the burning at the stake, how about we talk to a person first? Say person A is coming off as crude to several members. Rather than jump for the ban button, we could start a thread addressing that person, along the lines of:
"Your comments here, and here, don't quite strike us as meeting a 'polite' standard. We're worried that continued postings like this could lead to a degradation of the quality here at APS. Discuss it with us!"
Rather than just kicking an otherwise enjoyable member off the board, it's more of an intervention type situation, giving person A a chance to make minor course adjustments, if needed.
However, I have to reiterate that I haven't seen anything worthy of a ban in my time here, IMHO. Of course, I myself wouldn't ban anybody for a reason short of vulgar personal attacks against a fellow member.