In our guild runs, if we pug a spot or two, showing your legacy name is required. We want to know who we are bringing. I personally don't group with anyone hiding their legacy name. Whatcha hiding for??
I personally hide my own legacy name, why? because party time cybereye mc-cyber is just too dam long. legacy name is a terrible way to figure out whos who. CHAT ENDED!!! (like a baws)