I am not sure about the legal implications. But, I do see the concern. Someone else mentioned the analogy of patients preferring physicians of a given sex. I

I am not sure about the legal implications. But, I do see the concern. Someone else mentioned the analogy of patients preferring physicians of a given sex. I would not be surprised if they find a way around this by just having riders 'select which driver you want'. Effectively putting the onus on the customer to do the discrimination.