Can anyone recommend good sources on the social dynamics of witch-hunts?

Not necessarily about witches, of course. I'm interested in the hand of Moloch in these situations: social incentives to go along, status rewards for being more morally outraged than your fellow citizen, self-protection by avoiding looking insufficiently outraged, the not necessarily intended but still unescapable prosecutorial traps, the social impossibility of denying the actual existence of the outrageous facts...