Really enjoyed the look into the historical context of the ideas that have filtered into Social Network Justice Asshat communities (is that a better term? Because it certainly seems like these communities spend a lot more time fighting within the sphere of social networks themselves than anywhere else).
That last bit brings up what I think I find most bothersome about these kinds of "activists." It's not that I feel threatened, or hurt more than feeling mildly put-out when they make sweeping negative generalizations about white heterosexual males. It's that there's a lot of people out there who don't give a fuck about social justice and will quite cheerfully leverage their power as a social majority to whip up antipathy for minorities in response to these statements.
Talking unnecessary shit about whites/men/heterosexuals isn't a threat to said whites/men/heteros. It's a threat to the people who don't realize how much worse things will get for them if they aren't going to be smart about their cause.