We get them outside our house as well, point being they may be a bit intimidating, but then drunken people outside the Bird in Hand smoking are fairly intimidating, I wouldnt call the police on them unless one of them actually did something and I wouldn't call the police on the kids unless one of them actually did something.

Guilty until proven innocent? Its not fair that we instantly assume that the kids are up to no good simply based on the fact that they are adolescents hanging around in a group.