ok, i'm just typing up this response because i see so many posts here about "censorship" and "man-hating".
imagine an extremely sexist guy scrolling through twitter one night. he, of course, would never acknowledge he's sexist. he might even think of himself as chivalrous. he sees a tweet made by a woman, that says "i'm sick and tired of being treated like trash by men".
what's his first thought? "not ALL men are like that! how dare you accuse me of being sexist! feminists are so unreasonable!"
now, imagine that the tweet was worded differently. "i hate being treated like trash by some men."
what would his reaction be then? most likely: "well, THOSE men are bad. but i'm obviously not like them so it's ok."
which wording provokes more thought? which reveals more through the reader's response?
if the guy really was as "chivalrous" as he thinks he is, he would instead react to the first tweet calmly, and think something along the lines of: "maybe she's had a bad encounter today. i know she doesn't hate every single man."
all those phrases like "men are pigs" and "kill all men" - they're not all-encompassing, and they're powerless. if a girl says one of them, she could literally be abused or murdered. she doesn't yet have the social power to have those opinions readily accepted.
if a man says "i'm going to kill any girl that rejects me", well, guess what?
he'll receive public support. (it's elliot rodger's "retribution" video, so warning for murder. just scroll down to the new comments section.)
so my point is: just because women can say something like "i hate men" in small communities on tumblr, doesn't mean they can do that in the rest of the world. don't act like there's any harm done to men through those phrases, other than hurt feelings. and definitely don't equate those hurt feelings to the discrimination women face daily.