I think I tried reading Metafilter once; it was a thread discussing whether men rape for power or for pleasure, and anytime a man tried posting in the thread they were driven off for not "centering women".

Although that style of discourse was pretty common at the time, quite popular on livejournal and later tumblr.

Lately I see complaints about it being full of people who tell you to go to therapy as a solution for everything. Which I didn't even know was a type.