"I agree with Macnewpants2013. What on earth was the teacher doing drinking coffee in a classroom any way. Surley this breaches safety regulations. Ok I know the children are 14/15 or are they 15/16 but even so. Not only that but surley drinking coffee around electrical devices is very unsafe. "
Probably trying to keep her voice lubricated given that it is unlikely she will get any time during the school day to sit down quietly in a safe place and have a drink. I find after 4 hours of lecturing that I develop a tickly cough that makes it difficult for me to speak at all, water doesn't help to ease it, but coffee does.
"Also imagine if you called your child a twat and he went into school and mentioned this, we all know what the teachers would (probably)do, inform social services."
Do you really believe this scenario is at all probable? I can imagine social services using fairly robust language to a teacher who wasted their time in such an indefensible way.
Of course we all know the teachers shouldn't have said it. The question is whether it is a meaningful use of anybody's time to launch a complaint every time somebody does something they shouldn't. As a parent I would hope that my dc's school does not apply that approach to me.
As I said earlier I want my teens to learn to distinguish between:
unacceptable = you shouldn't do this
and
unacceptable = I have to challenge this
And if I don't teach them nobody will.
Life is full on injustices that it is your moral duty to challenge. If you waste your energy on minor issues you won't be able to do it effectively.