Literally all characteristics? I think there are some which are protected by law and generally considered not cool to discriminate on. I'm just asking which one

Literally all characteristics? I think there are some which are protected by law and generally considered not cool to discriminate on. I'm just asking which ones are ok to discriminate on since apparently submission to medical procedures is one of the good ones. I wonder how people would feel if an employer required other medical treatments, or the inverse: if an employee had a medical procedure the employer doesn't like. Also, I'd like to clarify that your comparing a company requiring a medical procedure to be performed on all employees bodies to an acceptable use policy telling employees not to use Facebook on their company machine, right?