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encyclo - 5:34 pm on Mar 21, 2007 (gmt 0)
I believe that the .uk ccTLD works in this way in that an individual can opt out of whois listing. The .ca ccTLD is planning a similar initiative.
There's a huge difference between domain registrations by private individuals and registrations by companies. A company should be required to give full contact details, an individual should retain his right to privacy (but should supply the information to the registry).