[Blink]

Another few road blocks I was thinking of: email verification or IP checking.  Although one could get around both with a bit of work.  (like everything)

cough Proxies and emails generated on a personal server that has a bot that goes to link... cough

Personal server?  Sounds like a lot of work...  

There's probably better ways of confirming emails, this just seemed obvious to me.

Any server that you have access to and can be used for email works.