It is a security issue Jim. If something should happen on the bourse floor, for example a theft from a dealer table, what is the first question asked by the investigating authorities? What did the suspect look like? Response: He was wearing a white tee shirt and a Mickey Mouse badge. If the dealer only remembered the first name "Harry" on the legitimate badge, we can look through all registration forms for everyone with the name Harry and provide addresses to police. So much for annonimity.