True. This isolated case would be a breach of privacy. But all of them combined (wars for oil, prosecution of foreign nationals in foreign countries, killings of civilians, etc) would certainly be enough to put them all in jail for life.
As for guns, your police and armed forces have more of them,
Not my police. I'm happy I'm not an American. There was a time (pre-9/11) when I thought the U.S. would be an awesome place to live. I even visited the MIT to check the place before taking a decision. Then 9/11 happened and your government used it as an excuse to invade some countries and become a police state.
I moved to Japan instead.