I really doubt it's as simple as “just not legal”; most anti-discrimination laws allow for reasonable exceptions, especially when women's safety is at stake. T

I really doubt it's as simple as “just not legal”; most anti-discrimination laws allow for reasonable exceptions, especially when women's safety is at stake. There may still be lawsuits, but it's not obvious that Uber would lose. It's not even clear that men are at all disadvantaged by current proposal, given that the preference isn't guaranteed to be honored, so female drivers most likely will still be expected to pick up male passengers. In that case, there is essentially no scenario where a man is refused service because of his sex, and it seems questionable whether there is any grounds for legal action at all.