Crumbs, that really takes the biscuit.
Just because the youths hit the females backside, that is assault, can understand others saying polices reaction is disproportionate, but i ask what would your reaction be if someone were to hit a female who you were with on the buttocks?
Apologies if i have misjudged things re the situation, perhaps i am just choosy about who tenderises my tush, a youth smacking my 'pert'

erogenous zone, would find me seeking him out, to kick him in one of his erogenous zones.