The problem with just letting him *play* aka get bored and kill any teammate, is this:
After he tks, and no one is able to stop him, It becomes impossible to reprimand any other tker\base tker
while he is playing. ("but john is tking too!"). Also while he is tking, others start
to tk him, after a while everyone starts to teamkill other people, it goes from a fun game, to a lord of the flies
tk fest. I know I don't play when he is on, and obviously tking, I wait till after he leaves, and just spec and
watch people leave the server with "...he tk'd me again this is bullshit" "..has disconnected".
It really easy to solve, make him a separate logon in whatever OS they use, its a great idea for any parent
that allow their children to use their computer, or have a family computer.
*tk = teamkill