User Name Changes--opintions needed

[scheides]

I've had a few requests lately from people to change their user name. I obviously have the power to do this, and we do not have the points system like we used to have. Does anyone have suggestions on what a good way to do this would be? I do NOT want people just changing their names willy-nilly, I answer enough stupid questions that have already been answered and as such dump a LOT of time into admining this site. The ban-a-member has added to this, and that is totally fine, but I just want people's opinions on name changing thing. Options include a one-time fee/donation, service donation to the site (i.e. being bitch at a dyno day or something), etc.