Yeah I think it's be beneficial bc so many answers are prejudicial based on gender.. People give completely different responses based on the gender ratger than content. Be cool to exercise people mind to focus on matter at Han that relying on stereotypes to offer wisdom.
Not necessary. You're already anonymous enough when your username/specific age isn't showing. If you need more privacy than that, then you probably shouldn't even be on the internet in the first place. Especially since you can even lie about both your age and sex on here when you sign up.
I think it's beneficial to know the gender of the question asker to help tailor your response towards them. Also it just seems like an excessive amount of anonymity and it goes against the who theme of the site which is guys asking girls questions and vice versa.
If we really need more anonymity then they could hide the age for anon posters.