The person who banned him could have been a bit more mature about it and not make a stupid ban reason.
And its a 1 time offense on a game, come on?
Because if they freekill once and get away with it, they're more than likely going to do it again. Better to remove the bad players now than deal with them when they've killed half the server for no reason.
You probably were also indignant or refusing to answer why you freekilled him.