Many UniSFAns go by more than one name. Some are more often known by their nicknames than their real names, and in at least one case the nickname became the official legal name. The Smurf and Spice years provided many nicknames. Many UCC members had a three letter handle by which they were also known at UniSFA. And something had to be done about all the Davids or it would have just been a mess.
See also the UCC's list of TLA's (Three Letter Acronyms)