That may be true that he's the type to call 911 at the drop of a hat. I know of the type. Sometime though that isn't necessarily a bad thing, especially when your neighborhood has been having a spate of break-ins as this neighborhood apparently had.

On top of that, asking someone what they are doing in your neighborhood isn't against the law.

Punching someone and smashing their head into a sidewalk because they ask you what you are doing is against the law.