I mean first of all, in 8 years on mumsnet I've literally never seen anyone admit to posting a reverse so who knows, maybe it's not even a thing. But assuming it could happen, in the posts which get people calling reverse it makes no sense at all. As far as I'm aware a potential reverse is when OP say has a disagreement with someone and suspects they themselves are in the wrong. They don't fancy getting their arse handed to them so they post pretending to be the other person. But I keep seeing people call reverse on posts where it's obvious that OP is in the wrong. And saying things like 'this has to be a reverse, no one could be that stupid'. Ok so you're saying that a perfectly lovely OP is offended by a friend's shitty behaviour and wants some support. All they have to do is start a thread giving their perspective and get loads of supportive replies. But they'd choose to post pretending to be the bad guy and get a pasteing instead!