Marc Riddell wrote:
I believe anyone who wishes to make edits to Wikipedia should have a single, individual, registered User Name, User Page and a Talk Page.
Quite apart from the issue of anonymous contributors, your demand introduces additional problems.
I operate two "bot" accounts; [[User:GurchBot]] and [[User:GurchBot 2]]. So I'm already in violation of all the above things, I have three of everything (four, actually, as I have another account for testing blocks and the like). Both these bot accounts are used for high-speed maintenance work and so require a bot flag, which can only be set per-account; separate accounts are the only way to achieve this.
So your demands would not only mean the end of anonymous editing (and a sharp decline in the amount of information added to Wikipedia) but also a complete rewrite of the bot policy and major changes to the way that the MediaWiki software works. And I haven't even touched on username changes, legitimate uses for alternate accounts, and a whole lot of other stuff. Your suggestion simply isn't workable.
-Gurch