To be honest, I don't think these "gangs" are of school age. They appear to be older and it's not just been happening now the schools are off, just I think I'm noticing it more waht with spending time in the garden/having windows open, it has been occuring for a while. I'm not too old or ignorant to say it wasn't like that in my day. Of course it was, we did hang around on the street corners. What we didn't do though was kick footballs at locals cars, have dangerous dogs on metal leads, abuse each other to the stage fights nearly broke out, wind up said dogs so they were going mental, drop all sorts of litter all over the street with no care. This lot aren't a group of teens being tarred with the same brush as the bad ones, these are the bad one. I think I'll pass on the advice to go and speak to them. I guess it's another call to the police/neighbour hood crime team.