I would hope the readership around here could elevate the discussion beyond trite little quips such as this. Again I come away disappointed.

For future reference: these "reverse the roles" arguments are about as shallow and ignorant as one can get. The context is completely different for the "reversed" roles, rendering the comparison not even meaningless, but downright hostile.

Probably. Because men make up the majority of the software industry, it would be a little pointless to have a Men's hackerday, and so would be seen as excluding women for the sake of excluding women. This hacker day on the other hand targets women, who are a minority, and thus has a purpose for excluding men other than misandry.