"They can ban you for having red hair or blue eyes if they please and they would be foolish but not in the wrong." I am not sure if that is true anymore, with

"They can ban you for having red hair or blue eyes if they please and they would be foolish but not in the wrong." I am not sure if that is true anymore, with the implementation of anti-discrimination laws. I mean practically it is still the internet, but if your service is public and beyond a certain size, someone might indeed sue you for doing that.