If so, why? Just wondering after listening to a couple of friends over the weekend who are intelligent, sensible people but I found their attitude quite surprising.
One of them has a DD at primary school who is aggressive and often lashes out, she's 10. She came home on Friday with a note from the teacher asking her to write a letter over the weekend, apologising to a girl who she shoved in the classroom. Fair enough I think, my DD said everyone who is caught pushing or shoving gets the same treatment. This girls mum was outraged, said she would tell her DD not to write it, the teacher should have got her to do it at school as it infringes on the parents weekend etc etc. 
Another friend, again nice people, who I have always thought were sensible level headed types. They have a 12 year old boy at secondary who is occasionally put into seclusion at school for bad behaviour. They were telling me this in front of the boy, saying how out of order it was, how he wasn't a naughty boy, just misunderstood and the head of year was a mini hitler who didn't like their son ....... etc etc. You get the gist.
I've been thinking about this a lot, I have two girls who start secondary in September and I just can't imagine slagging off the school and the teacher's decisions so blatantly in front of them. It's almost giving them permission to do exactly what they please at school without sanction, knowing that mummy and daddy will side with them whatever.
I know there are some instances that are unfair and there are some crap teachers around, like in any other job, and that is different but there seems to be a general lack of backing up what the teachers have said and what they are trying to achieve. Surely if they've done wrong then yes, write that letter, sort yourself out in seclusion, do the detention and parents should be behind them 100% unless in exceptional circumstances.