Four reasons for me MK.
First reason. Because we'd all be tempted to taze our mates for a laugh. This would undoubtedly lead to stabbings in certain parts of the country due to people realising that their mate didn't like them very much anyway.
Second reason. Could you honestly own a tazer for longer than 1 year without having found a reason to test it on someone/something?
Third reason. Foreigners would find themselves repeatedly tazed at traffic lights due to their poor driving skills. This would lead them to them ignoring the traffic lights more than do already and provide them with an adequate excuse.
Fourth reason. Jehovah's witnesses. See second reason.
Just to clarify for any Witnesses on the board, I'm not suggesting mass tazering of you and your brethren. Nor am I suggesting that you're not entitled to your views.
It's simply your unerring penchant for trying to sell me a copy of Watchtower just as I've settled down to watch the Life of Brian.