I'll go ahead and clear this up, since PM apparently doesn't feel like answering it atm :P
This is pointless.
When a user gives up their name, it's not longer their's. That's their problem.
Also, this hasn't even happened before. If this was a huge ordeal happening constantly, it might be a different situation. For now, this isn't really happening and it's really not someone's name anymore if they've given it up.