It probably would help if they had something to do.
I think the playing fields have been sold and the youth clubs have been closed.
Isn't there a youth club near the station - Platform 1? And also something in the road behind the Railway Telegraph pub? Not sure what these offer, but isn't it the casewhen you offer things like this, the "yoof" who cause the trouble are those least likely to take it up or even disrupt the youth club.