Actually, I've seen various posts of that very nature, where mothers have, for example (and I'm not referring to any particular post) said things like 'I want to move me and the kids 300 miles away, and my ex is trying to stop me' where an awful lot of women on here have told the OP that actually, that's not a fair thing to do.
I also think it would depend on the information provided.
If the whole truth had been told (eg: my ex husband sees my daughter regularly, like clockwork and without fail, every Monday. I have told my ex husband that he can't see my daughter until he's bought her x, y and z. I don't work, and neither does he, but it's not fair that he doesn't pay child support/buy her everythig she needs) then she'd probably have got a fair few answers telling her that she was being very unfair on her child.
I fail to see why on earth you have brought the fact that some resident parents bend the truth and lie, when clearly the OP has solid evidence of the abuse she's suffered.
You'll notice that I was one who did not immediately jump to her defence in the way you describe, either.
and please, you've personally insulted me too, so leave out the accusations, eh? You're no better than me.