it has more to do with the typical gender of trolls rather than
  the typical gender of someone defending a particular issue. Most
  trolls are men. Most of the times this topic is brought up is by
  trolls. Most of the time trolls, who are men, pretend to defend
  controversial issues they really don't care about personally. In
  short, I think it's more indicative of the "typical troll" than
  anything else. That's not to say you're incorrect: You may well
  be correct. But that's my best explanation for why you see it so
  frequently: the correlation has a significant additional
  component to it that can be considered. == Indeed. I mean, it
  depends on the group as well. Philosophy groups, at one time,
  were almost EXCLUSIVELY sausages gossiping about old dead men
  they read about in Philosophy 101 + Ayn Rand. Now there's a
  slightly larger representation of women in Philosophy groups but
  still very much the minority. If you want to find where there
  are a lot of women talking on the internet about intellectual
  issues, you might be more prone to find it groups where there
  are large amount of mothers or teachers or caretakers or
  psychology. Also these days, theoretical physics has been
  growing in popularity among women online that I've seen. The PhD
  candidate list is growing tremendously and I think it's
  marvelous, although the job market is saturated. Anyway, yeah -
  you won't find a strongly vocal female base in Philosophy groups
  generally. There's a higher representation of female on tumblr
  for example, who are very chatty and a higher representation of
  male in 4chan, for example. [I don't go into either side much:
  tumblr a ittle bit, but 4chan, never. It's too... much] As I've
  been a member of psychology and groups on education and teaching
  forever, as a male I'm generally under-represented by other
  males. But that being said, I don't pay attention to the gender
  of someone I'm talking with online much, unless they bring it
  up. But I do notice trends and populations. I guess I'm a closet
  sociologist at heart or something. ==