[The Deuce]

I once had a neighbor come ask me to not warm up my motorcycle on the street. He thought it would be better for me to do it in the garage. Hmm, concrete megaphone, or on the street?

Screw the neighbors. PKRWUD is right, call the cops and find out what you can do about them. I've found that if they are trespassing on your land, let them know you will press charges for that.