YANBU
My now 15 year old DS went to a primary that gave 'star of the week' and other rewards to the naughty kids and it's heartbreaking for the 85% of the rest of the class who are being tortured by them and then seeing their picture on the bloody wall.
A the school there were a high proportion of children with behavioural problems, social problems galore, massive deprivation.
Yes, you would hope that you could feel sympathetic to these children. But when YOUR child is being spat at, bitten, punched and kicked Mon - Thurs then the child in question doesn't do it on Friday and gets an award, it hardens your heart.
It also doesn't work. The teachers hated it, the parents hated it but it was the school 'philosophy'. Some bright spark read an article on positive reinforcement and decided to follow it to the letter. I know it doesnt work because I still know the 'naughty' children as I live in a small community. They are still off the rails but the well-behaved children who didn't get rewarded just ended up demoralised as well.
My DD now goes to a different primary with a more inclusive reward system - everyone who behaves well gets rewarded, those who don't, don't.
I'm still giggling at the 'my child's cleverer than all your children'. Well my dad's harder than yours, so there.