If its that bad you could try capturing them on home camera footage, and then maybe go to your local council about it.
Surely they have some kind of stance about Anti-Social Behaviour.
Supplement from 05/14/2006 05:41pm:
put the garden hose on em!!
taht'll cool em off a bit
religion has taken a backseat with kids + teenagers in the last decade u have 2 admit. The church is struggling 2 connect.
A bestselling book portraying christ having a love affair with a prostitute pulls more audiences than sunday school.
Still, i guess it's upped the interest in the church...in some kind of way.