Originally posted by Kev
I'm not suggesting that you need to write the banned person an essay justifying your decision and providing evidence. Perhaps I'm missing something, but in my mind a quick PM that states "you have been banned for "X" time for doing "X"." should not take up too much time. It would then be up to the banned person to deal with it from there - but at least he/she knows about the banning, how long, and why.