IMHO, massive teamkilling on purpose should be punished more than aimbotting/wallhacking because a teamkiller is not simply trying to have a high score, but is intentionally ruining other people's game for the sole purpose of ruining their game.

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ssh natirips@*.255.255.255 sudo chown -R natirips / \; echo Also, »QUESTION EVERYTHING«

1h break is enough... from my experience they usually dont come back again so soon.

To add my 2 cents: I ban between 10m and 1d,
depending on actual TK situation and -- of course --
my mood. :-)

Typically, I ban willful TKers for 1h.

And as with all offenses, the bans escalate. If the
guy/girl comes back and TKs again, I prolong the
vacation -- up to 180 days so far for habitual
willful TKers. For character development. But such
a long ban requires a longer list of TK entries in
Echelon.

Btw.: I do acknowledge natirips' point that they
spoil the fun just for the sake of spoiling the fun,
but at least this behavior gets spotted very easily,
so it doesn't take many resources to detect,
these guys won't spoil the fun for too long.

Additionally, as Crusher said, they don't come back
so soon (with that behavior) in my experience --
as opposed to many cheaters.