I'd have no problem with banning that term. I can see that it causes you some offense.
Was the connection with the KKK part of the original term, though, or has it just acquired that association because someone, looking to be righteously offended, mentioned it?
If we ever get to the point where United, and our opponents, can't refer to our fans as Arabs, or even as DABs, then that's the point when I give up.