Bill, we'll have to agree to disagree (first time for everything :)) I agree that in your hypothetical case the teacher should not be permitted to teach but to resort to a public trial is likely to be hugely detrimental to the teachers own family. Please note I am not excusing the behaviour but once the precedent is set it's difficult not to continue with it - so the case you describe might well have some arguments for being made public but other cases don't.
Olenna, I'm not just talking about this teacher. I don't think being a shit teacher excuses smearing someone's name like this anyway but I'm thinking of for example the social workers who failed baby P, who were subject to almost the same level of hatred and public shunning as his mother was. That to me seems wrong. Being shit at your job should have consequences but for most people, those consequences are severe enough with the loss of income, possibly home, status etc.
I do know a local man and this goes back some years as I was friends with his eldest daughter but he was dismissed from his job for what was deemed an inappropriate relationship with a student, which it was, although it was conceded that he'd misguidedly tried to reach out to her in a fatherly sense rather than a sexual one, but the knock on effect on the whole family was awful. The press might claim they report these stories in the interests of children but it wasn't in the interests of his children.
I also remember a senior policewoman being vilified in the press; she did clear her name eventually but not before she'd attempted suicide.
i'm really not, as an earlier poster claimed, an 'unpleasant bully': on the contrary I hate this practice and wondered what others thought, though it seems I'm in something of a minority! :)