This would be alright as long as it did not disturb gameplay. The names that some people already have in game make it hard enough to /tell them as it is. The full name should be an additional detail of the character, but should not be necessary either. Some people I know have gone by their nick for so long that really no one knows them by their real name anymore.
Maybe a system that where you target a player and type /name you could see their full name...or better yet it prompts the person to accept letting you know the name. That way if they don\'t want to tell you their name you don\'t know it. *shrugs*