Few Points (on topic):
A - Say there are 2000 active members and 100 are female, a fair "un-bias'd" ratio of mods would be 20:1 male, right?
B - Not everyone lists their gender or puts their name on their profile
C - If she reported it several times, how does she know nothing was done? Did the mod reply saying "Can't do anything!" or maybe the person got a warning point (but not ban) and then it stopped?
D - If the mods did know about the situation and decided NOT to take action, then they would be to blame and the problem is not just the "male" but the "mod" as well.
E - If your going to complain, I mean there are about 3 females agreeing about this so far right? Why don't one of you step up to the plate? If you have the credentials and are willing to do good, then it'd be great, but don't be biased and over punish the males and under punish the females.
Someone else say something, I'm out of the convo for a while 