Anti-women groups use it in a derogatory way, so if you're in those communities that's how you'd see it used. Similar to how many people use feminism as an epithet.
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.
If they have a category for "belligerent feminism" it sounds like they're still feminists and therefore they're not just "associating" with the movement, they ARE the movement!
Personally I don't let cranks define words for me. That includes feminist cranks and conservative cranks alike.
"Public consciousness" is worth paying attention to, but I'm not rewriting my dictionary based on it.
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.