[xeno000]

Most of the collateral damage in The Avengers was the unavoidable consequence of fighting off invaders in a major city. None of the heroes deliberately caused destruction and casualties; even the Hulk went on his smashing spree with a view towards stopping the Chitauri. Certainly the Avengers would have avoided doing harm if they could have, otherwise they would merely be a lesser form of villain rather than the heroes of the piece.