Let's get all this straight, if I've understood this rather garbled debate correctly.
Identifying someone you think might be sexually abusing children, setting up a false honey trap for them (i.e. not a real child) and then reporting it to the police is one thing. The police can then decide whether there is sufficient evidence to prosecute. If they can be relied on to act professionally - evidently, sometimes they can't.
But that is completely different from shouting from the rooftops that someone is a paedophile on the basis of a rumour. Or beating them up.
The witch hunt analogy that's been discussed here (though the accuracy of those stories from a long time ago is questionable) is appropriate in that in both sets of cases, completely innocent people have been persecuted by a hysterical mob for whom all reason and common sense has gone out of the window. I don't know what psychologists would say about this kind of behaviour, but it seems there's a certain kind of person who, when part of a like-minded crowd, can be whipped up into a frenzy and become murderous. William Golding illustrates this in Lord of the Flies. I suspect paranoia comes into it somewhere. According to what I've read, those women accused of being witches were just a bit unusual in some way, like the murdered man in the Mirror story.
The press are partly to blame for all this, due to the frenzy they've whipped up over the last ten years or so, which has encouraged people who are a bit paranoid to see paedophiles everywhere.
But there's a positive side to that as well, in that the subject of child sexual abuse is now out in the open and people are a bit clearer about what a paedophile is. Thirty years ago the average person couldn't tell the difference between a gay man and a paedophile who targeted boys: both were called 'homosexuals'. We keep hearing, as with the Jimmy Savile case, that in the past, children who complained about sexual abuse were usually called liars. It's quite tragic that all those people, long since grown up, had to wait until he was dead before they felt able to come forward. I've met lots of people who were sexually abused as children (by family members and not strangers), and some have never recovered from it.
So the pendulum has swung from one extreme - making it a taboo subject - to the other, encouraging people to see paedophiles everywhere. People need to calm down, use a bit of common sense and listen to reason, for the pendulum to swing to the middle, where it should always have been.