[ghaff]

Well, the law is already in the picture; discrimination lawsuits aren't a new thing. And it's also true that, just because you encode certain things in an algorithm (or just let an algorithm learn from existing discriminatory practices), you can't absolve your own responsibility.

There are practices for employment advertising/recruiting that certainly highlight issues in a new way. Is doing on-campus recruiting or advertising in media that targets specific young demographics illegally discriminatory? Probably not. (IANAL) Is targeting young people using Facebook algorithms OK? Dunno.