Totally agree with teachers being people too. And unlike primary school they are given more freedom and respect and sometimes it doesn't get reciprocated to the teachers. I know this because I've been on both sides of the track and I don't know if it's changed much but when teachers were dobbed in it usually wasn't because they were at fault but often because there was a gripe because they could hold their own. Not that I'm accusing your son of anything just want to offer another perspective.