Even if they remove the explicit gender category in their advertising interface, it seems relatively trivial to find proxies for gender (or race, or age, for th

Even if they remove the explicit gender category in their advertising interface, it seems relatively trivial to find proxies for gender (or race, or age, for that matter) to target a specific subgroup of people with your ads. It's possible to algorithmically bias the ad-targeting algorithms in such a way to achieve parity in whatever sensitive attribute you are concerned about, but that will come at the expense of utility of the targeting (since you will have to show it to more people who you actually don't want to target, just to achieve gender/race/age equality) - of course, that might not be so bad if your hypothesis is that the advertiser has a bad mental model of his target group to begin with and you think that Facebook should force him to make it more egalitarian. I don't think that will happen though, Facebook might remove explicit gender targeting, but I doubt it will do much to help with biased ads since people will just use proxies for gender etc. instead.