According to Sankaku complex, a gamer who was wallhacking in Counter-Strike got a harsh lesson when he was stabbed through the head with a knife – for his crimes against gamer kind.
The assault happened in the Nothern Provence of Jilin, China, when a mob of quite serious gamers noticed the boy wallhacking at a local internet cafe. What followed was an argument, and a knife to the brain.
The man somehow survived, but I suspect the rate of wallhacking at that Internet cafe has now plummeted as a result… a fair deterrent?
More info, and gore available at SankakuComplex (which may or may not be as factually accurate as a flying tuna).