(Originally from the NYT, but an archive.org link to avoid giving them traffic.)

Our neighborhood crows have never bothered us (and if they've eaten any of the local house sparrows, supposedly a part of their diet, I thankfully haven't witnessed it), and I suspect appreciate the food they get from our feeders and yard. But man, do I never want to piss them off. If I do, I'm following the plan of the woman at the end of this article and bringing food to bribe them with.