I don't know, maybe nothing. Maybe it's all too far gone. All i can say is that when I were a lad...(I'm 34 ffs) we were able to enjoy ourselves and occupy our leisure time a damn site more productively and imaginatively than seems to be the case currently. Christ I remember pretending that a local trea stump at school was the cocpit of the millenium falcon (it had a wierd shape)! But now that stump has been paved over and health and safety would never allow it. To say nothing of the lack of imagnation kids today seem to display (not all, obviously; my mate's son is very imaginative, behaving himnself and raised properly). We didn't get pushers and weren't scared half to death by media scare stories about michael jackson (back then he really was the king of pop!). Sure we played up, but there's a difference between normal youthful exuberance and rambunctiousness and the surliness and attitude of today.
These kids today want everything and they cannot understand why anyone would dare speak out against them - even if they are out at 3am playing music loud on a car stereo! Unthinkable to me at that age - and id on't mean that in a prurient sense either. It just was and still is!
'Back in the day' we had less available to us yet the world was a better place; perhaps that's the problem. The increase of tehcnology (mobile phones with built in sound systems, gameboys, ipods and whatnot) seems to be commensurate with an inability to use it considerably - in fact it seems to encourage just that!
I think there is a major lack of discipline and responsibility being taught - probably the fault of parenting rather than schools. Look to the parents of these kids and you cans ee where they get it from, unfortauntely most of them are too old to learn any different at home. This creates the black hole for the pushers, abusers and gangsters you mention to step in. Now we have a lack of policing and a government that doesn't know how to do anything but attempt to legislate and engage in thought control (re political correctness) to change things - all the while living in a world apart from the rest of us. A local youth worker once said to me that, in regard to the local yobbos, it's one step forward and nine back. He provides services and facilities at the local church (as many rural communities do i imagine) and all the kids do is piss it up against the wall (literally, actually).
Something has to change, I just don't know what.