Honestly, though, we've got two sets of friends who are leaving the country for good after family members were attacked at random by groups of youths.
I have a work colleague who was randomly attacked and in hospital for a fortnight. The attackers took his mobile to film the attack.
I think much of it, too, is because the law is an ass and these perpetrators know damn well all they'll get is a slap on the wrist at worst.