What have you done?! All the clubs will be a mess now that everyone and their mother's getting a name change :( Still love you for it though!
Oh, and if it's possible, could the old username perhaps automatically be added to the "AKA" list in the drop-down menu that appears when you click on someone's username. I know it'll be listed in statistics on people's profiles, but it's just a hassle to check that for everyone who's gotten a name change. If it'd be too much of a hassle to get to work though, then oh well!