I've been on MN for over 4 years, and never seen the kind of stuff they refer to. There are silly, "men, can't wash up, eh?" statements, which is a generalisation and can be boring, but not big-league stuff. Really damaging generalisations are leapt on immediately.
In common with some posters who see the same anti-male bias, F4J seem unable to accept that OPs post about a particular circumstance, usually because it's extreme, therefore it IS more likely to abusive/controlling, whatever.
There's also no shortage of posters to put an OP right if they feel a sense of proportion is lacking.