Well, if it makes you feel better, just imagine that it's the police killing a pedophilic, freedom-hating, terrorist, Arab tax-man.
I don't know, I just kind of slapped America's pet-peeves together.
But yeah, I hate it, too. It has happened a lot of times, but only one time did I find out that it was actually gunfire. Apparently, a gangland-style execution took place just down the street. On one side, I hate weapons, on the other, I can't really care whether gangs kill each other, as long as they take it seriously and keep at it.
Anyway, if you hate gunshots, weapons, whatever, you should make your voice heard politically - Vote for someone who wants to outlaw weapons. Now, on the flip-side, people who fire weapons like this are usually the ones who do not own them legally, anyway.