That would suck, I would have to re-sign up as all my alternate user names.....though it might be cool, it's had to keep track of who I'm posting as, I've caught myself a few times.
Considering that they ban everyone that doesn't renew their platinum membership and makes them create another handle plus the multiple handles people use. That's a lot of handles
given they "sell" the site based on the number of accounts, it isn't likely they will clean out the 20K accounts that probably haven't been used in a year. Also, no way that I've seen, to delete your own profile...