I had a starter revolver as a kid and pointed it at an alley and fired just as a cop car drove by. He just looked at me and kept on going.
The only time I ever got hassled by the police was when a psycho mom called them because I was walking down the sidewalk holding a bow and target arrows, oh yeah, I was nine years old! The sent four police cars to surround me, the damn city probably only had ten or twelve cars total.