House SWAT raids generally anger me. They always end up in the wrong house and if someone shot at them while in the wrong house SWAT would shoot them and people would claim it is justified (not me). Sorry for that run-on sentence but you get the idea here. When they don't knock, they should expect to get shot at some day especially if its the wrong house.

"Remember that your adversary's desire to live is usually more powerful than whatever ammunition your are carrying in your firearms. Plan accordingly." -tire iron