I don't think it actually happens as much as these people like to say it does. It's just a convenient way to externally blame and berate those they don't like f

I don't think it actually happens as much as these people like to say it does. It's just a convenient way to externally blame and berate those they don't like for things they were going to do anyway. But to the extent that it does happen, it seems explicable with reference to the behaviour of children when told not to do something. Some evidently never grew out of it.