From: Anthony DiPierro wikispam@inbox.org
I seriously doubt requiring someone to create a throwaway email account in order to sign up for Wikipedia would change anything. By this, I mean I doubt it'd stop any vandals, and I doubt it'd drive away any users (although it might discourage casual users from creating an account, which could be argued as a good or a bad thing).
It would mean it would generally take up to 10 minutes to create a new account, as opposed to just seconds to edit anonymously from a new IP. For pure vandals/blocked users it would get tiring after a while, if they were all blocked in seconds.
Jay.