...it's not bloody surprising if your child takes absolutely no notice of you and carries on throwing grit in other kids faces/walloping them/making nasty faces at them/pushing and shoving, day after day after day?
What on earth do people think is wrong with 'Oi, NO!' in a believeable voice?
(Fully acknowledge that somewhere else on the internet, maybe even here, somebody is probably writing AIBU to think that OhBugger is a horrible shouty mummy?)