I always find this sort of discussion interesting - and I always suggest before we cast judgement, please do spend a week in the secondary school I work in Leeds.
From my experience, there are several factors that contribute to 'yob culture' and yes, although a stint in the military may sort a lot of them out but what a lot of the problems, in my opinion, come down to is lack of parenting skills.
Time and again, when I do parents evenings and get the chance to tackle the parents of tricky kids I see either defensiveness ('it's the teacher's fault'

or inertia ('it's not my fault, I don't know what to do'
Can of worms though.