Year after year you hear read stories about someone shooting and killing a loved one, thinking they were a burgular...I bet they wish they had a little more constraint, and investigated the situation a little more...
I think every person has the right to defend their family and their home, and although I think its scary that people get to become the jury, the judge and the executioner, part of me thinks at least it gets the scumbag off the streets, unlike a passive sentence which will have the criminal doing the same thing 18 months from now...
I'd like to say that people should use more caution and give warning, but then again, if the guy has a gun, that warning could be his trigger to start shooting into your home...Tough situation, but the more I think about it, if I wake up at 2 am and find a guy half way in my window, i'm most likely firing a shot into him.