@BillRM,
I certainly wouldn't encourage any sort of fear in my child for anything that was not based in reality.
I don't believe in crippling a person for life in that way either.
But it would seem to me that every parent should do a cause and effect risk analysis as to the possible dangers that might exist in a child's environment and make an informed choice or decision about how best to lessen the risk of any harm coming to that child.
What if you had an eleven year old daughter Bill. What if you found out her best friend's dad had been 'stung' talking to eleven year old girls about sex on the internet, and was waiting to see if he'd be charged with anything. Your daughter's friend then asks her if she can sleep over her house on Friday night.
Would you let her?
Or would you rather she sleep over the friend's house where there was not even a whiff of that sort of thing because, oh yeah, the father in the house isn't interested in talking to eleven year old girls about sex...!
That situation in the school sounds ridiculous. That teacher and headmaster sound like twits. If he'd cut his finger would she not have touched his hand to put on the band-aid?
False allegations and vindictive lies about people are an entirely different matter than someone finding themselves getting caught actually doing what they're not supposed to be doing.
You couldn't entrap or seduce someone who wasn't where he wasn't supposed to be in the first place.
And you have to ask yourself then - why was he there?