I am not saying it is fine for them to break the law or ride the bikes on the roads/paths.
what I am saying is your "crack down" simply means they have to find something else to do and seeing as all the parks, playgrounds etc are locked up or full of crack heads, what are they meant to do?
Surely if the goverment gave them a bike track to ride them on, or even just a field we would all be happy?
But no lets "get tough on these evil children". Lets ban everything they do, lets crack down on their large gatherings.
Hope your house isnt burgalled soon by some ex-bike riding youth who now has sod all to do.