A recent Economist article noted that a lot of the responses to the riots in England were merely "wishing scary people far away." What exactly is wrong with that? I certainly want scary people to be far from me!
It can be dangerous when this is merely a method to close our eyes to danger, but it is completely valid when legitimate things are done to protect ourselves. You must protect yourself, your family and your neighborhood first. Not doing so is far more immoral than anything else.
Hopefully people learn this before society completely falls apart.