I frequently get friend requests from fake profiles on Facebook (sometimes as many as 2-3 per week). They always list themselves as having gone to my high school (which is why I am positive they are fake, since I went to a tiny high school), and they
always are attractive-looking women. I do not list my sex on Facebook, but it is possible that the bot recognizes my first name as male and therefore friends me with a female profile, and that there are other spam profiles which are male, but I am almost certain this is not the case since I see in my news feed whenever one of my high school friends falls for the spammer, and they are again always female profiles. So I think it's safe to say that the vast majority of spam profiles on Facebook are of females.
The most widespread method of stopping spam in any form is to use flags to train an machine learning algorithm that picks out particular patterns in spam. These algorithms don't have political agendas, they just pick out common characteristics of spam. It is therefore entirely unsurprising that any such spam detector would learn to only flag women, and therefore to be expected that a bug in that algorithm which generated false positives would affect only women's profiles.
The reason you are downvoted is not because you are trying to highlight women's issues (I got 50+ karma for calling out another comment as sexist against women a few weeks ago), but because you were quick to imply a sexist motive for behavior that most any hacker would have immediately recognized as a natural consequence of how poorly-performing spam-detectors behave.