I agree with you to a degree, but unfortuately it will never happen. Out of our 20 house only 6 have men living in them. The rest are elderly OAPs or and a couple of young single ladies.
I'm sure that if Garry Newlove had just 3 other men confronting those lads with him, they'd have scarpered instead of setting upon him. They set upon him because he was alone against a group of them, he was out-numbered. At least a loud alarm has the chance of alerting me to the fact that something is going on, and I can perhaps help anybody whose car is being stolen. If enough of us go out to help the victim, the thief would just run away.