People have a terrible tendency of thinking that giving the discriminated against group better treatment will somehow fix the issue.
When in fact it only worsen's it cause you set up the stigma that they're people to be treated special.

Largely like the girls Seravee mentioned who will say stuff like "Let me in the guild, I'm a girl". 
If I ever had someone say that I'd probably give them a mini lecture like "So? You were born with a vagina, good for you. I don't care if your female, male, trans, lizard person or the fucking queen of england. You want in the Guild? Show that you'll be a valued and productive member of the community".

Blunt, I know. But I don't much care for people that try to use something as uncontrollable as their sex as a vantage point.