Meh, having lived within stumbling distance of the most dangerous neighborhood in the Murder Capital of the United Kingdom -- where the murder rate is still 1 per 100k lower than that of New York (which is, if I remember correctly, lowest among the big American cities) -- I have to say that my impression is of the Brits being afraid of the bogeyman.
Not to say the the kids aren't occasionally a problem, but mostly the annual Missing White Women Invasion of the Yobs season seems be more of a matter of old people being afraid of young people. It's quite common in college towns here.
The fear of kids over there puzzled me. Conservatives want live babies so they can raise them to be dead soldiers. - George Carlin