Inevitably they would all wear identical clothes and never have beards or long hair. When I'd go down to the office, there would be half a dozen guys there, all who looked just like the guy I was looking for. I couldn't just ask for the guy by name because if he was there he would get very upset that I had forgotten him completely in thirty minutes' time. Uniforms in a school setting are the greatest travesty. Kids need to be able to socialize to develop normally, and a face blind kid is already fighting a fierce uphill battle.
Uniforms can cut one off from all hope of socializing, and sadly, give up altogether.
No face blind person I know, who primarily uses clothing to tell people apart, can stand business suits. They are the face blind guy's version of putting a bag over your face. Business suits to me all look alike, and they hide the shape of the person very much. Most people who wear them also remove their beards and most of their hair. A face blind guy in a job where most people wear business suits can forever find himself going into conferences having no idea who all the people are.