I agree with the author that asking questions about superheroes is going to weed out qualified people (unless the project involves superheroes). When I interview someone, I do my best not to ask questions irrelevant to the job. I don't know why someone would ask a question biased against people from different cultures, etc.
As for whether Dropbox should change its culture to be more attractive to women, that's their choice. They should be aware that their decor might turn off some otherwise qualified people, whether or not they choose to act on that information.
I've worked for and interviewed for Google for about ten years, and our training includes not asking irrelevant and/or culturally biased questions.
I'm a card-carrying feminist* and thought it was hilarious, although I can understand how others might feel differently. I guess it depends on whether you see it as a dispute between different schools of feminism or between feminists and anti-feminists. Count me a pro-humor feminist. I never laugh so hard as when I laugh at myself.
I've worked with Neil, and he is indeed extraordinary. I'd say he's who I want to be when I grow up except it's not clear he's grown up. See, for example, the centrifuge in his living room (http://neil.fraser.name/hardware/centrifuge/).
As for whether Dropbox should change its culture to be more attractive to women, that's their choice. They should be aware that their decor might turn off some otherwise qualified people, whether or not they choose to act on that information.
I've worked for and interviewed for Google for about ten years, and our training includes not asking irrelevant and/or culturally biased questions.