Thing is, I'm not sure they all do it out of desperation. One incidence in the neighborhood was most certainly an addict, for which I agree with your point in helping them. But a more salient example is a group of professional thieves that stole a local plumber's truck and tools.
If you're down on your luck and for whatever reason have to resort to looting houses and cars, I can see your point. But if someone has made it their _job_ to steal my neighbor's livelihood? My sympathy runs out.