Ex FH Pat,
G-block itself, where most of the teenage G-block gang lived, is probably a group of lovely cottages on a leafy lane - in fact I'll make some sandwiches and have a picnic there this weekend.
Prison is no deterrent for them - more a right of passage from adolescence to adulthood. They'll be back inside again before long too. To stop this game, we need to hit hard at the cause early, which is poverty.