How would this affect you if you are using Github as a OAuth provider? Does Github mention under what conditions they are going to take away someone's username? No code? No OAuth? No activity?
But the religious groups are a protected class. Religion is something you choose. By that logic, it would be possible to discriminate against "Christians", "Muslims", etc.
One of the reasons I'm using Uber is that it's quite safe. Otherwise, most of the times you try to get into a cab, they try to rip you off. There are rigged meters, long routes, switching bills when you are paying, etc.