It's a more effective deterrent than stiffer sentencing laws as it has an immediate and noticeable impact on the would-be criminal. It also doesn't put someone capable of defending themselves in the more vulnerable position of trying to escape.
In the late '70s the St Louis area had a rash of carjackings, some very brutal. Then people started shooting the carjackers. Problem largely went away at that point.
http://news.tbo.com/news/MGBPCES018E.htmlIt is either a Wild West revival, a return to the days of ``shoot first and ask questions later'' or a triumph for the Castle Doctrine, the notion that enemies invade personal space at their peril.
>>snip
``It's common sense to allow people to defend themselves,'' Bush said Tuesday as he signed the bill, which takes effect Oct. 1. ``When you're in a position where you're being threatened, to retreat and put yourself in a precarious position defies common sense.''