I think youre looking too closely into it. Men tend not to wear their hearts on their sleeves which is neither a good nor bad thing. On a thing like Facebook they are less likely to do the whole share this link if you want to beat cancer stuff that a lot of my female friends tend to do.
This is what I originally thought too, until I noticed the guys went rather out of their way to criticize the practice.
There's a friend of mine who is very liberal but often finds himself at odds with feminism, particularly if it requires PC-ness. This is something he sent me that he mocked a lot over the past week:
http://i.imgur.com/gWe2umL.jpgMaybe I'm just observing a subset of the population that is particularly grounded in the internet, and therefore a bit less sensitive towards social interactions than a lot of others.