I must be lucky in having a wide bunch of slasher friends (I've written slash myself, but it's not my main genre) who aren't anti-feminist. I've heard of the ones who are, mostly in rants from the slasher friends and in ffrants.

I try not to make assumptions of people because of ships or genres, mainly because I ship things like Zutara (which gets bashed) and Harry/Hermione (which gets bashed to high heaven) and femmeslash (while not being a lesbian, which surprises people somehow). Sometimes, though, you run across a walking negative stereotype and it's really, really annoying.