Back when we had to create Member IDs, I was one of the first people to be able to do it (because I had pre-registered at the con for the next year, and we were required to make member IDs before they opened up to the 'public'). I thought that they might put the Member IDs on the badge, so I rushed to get the name I wanted.
Turns out it didn't matter. Sigh... I still hope that one day they might put the Member ID on the badge instead of your name. I always have to cover up my name, and it's a PITA.