Justified after the attack? That's like being bitten by a rabbid cat after you kick it and saying, "that's why I kicked it, because it would bite me." lol
Seriously though, other than the standard garbage answers of "just because we can," was there any reason behind the attacks? While I don't necessarily agree with the tactics of the OP, I do certainly sympathize. It does get quite fustrating when you have no idea why you're attacked.