I would say Using OAuth would be your best bet. Making it so that the users can login only with gmail by removing all the WordPress registration and login. 

http://wordpress.org/extend/plugins/oauth-provider/

Google Apps login in wordpress
Recently I created a CreditKarma.com account so that I can keep and eye on my credit.  Upon logging in, I noticed I have a pretty low score (not that surprising since I just opened my first credit card recently), but I had a look around anyway just out of curiosity.

What I found out was that I have three medical bills in collections from my local clinic that total around $250!

What's odd is that I have insurance that should have paid those costs, and I've never received bills from them before for that reason.

What can be done to get this removed from my credit report without paying it, since I wasn't supposed to pay it in the first place.  Likely this started out as just an insurance mistake between the clinic and my insurance.
