I'm not in any anti-women groups, though I've known or read some people with anti-suburban bent (or rather, against American-style suburbia and suburban life), which is where I guess I must've picked up these connotations.

As for feminism, yes, I know a lot of people who use "feminism" as epithet and justifiably so, though one usually tries to attach some word to distinguish the crazies from those actually helping women; people I know in meatspace usually call it "belligerent feminism". A lot of those people are women! They prefer someone advocating for their rights instead of the people who use it as a pretext to destroy others or win spotlight for themselves; since the latter kind essentially appropriated the word "feminism" in public consciousness, these women decided to disassociate themselves from the movement.