'Following revelations that a high-ranking member of Wikipedia's bureaucracy used his cloak of anonymity to lie about being a professor of religion, the free Internet encyclopedia plans to ask contributors who claim such credentials to identify themselves.
Wikipedia founder Jimmy Wales said in interviews by phone and instant message Wednesday from Japan that contributors still would be able to remain anonymous. But he said they should only be allowed to cite some professional expertise in a subject if those credentials have been verified.
"We always prefer to give a positive incentive rather than absolute prohibition, so that people can contribute without a lot of hassle," Wales wrote...'
See also wiki ethics for public librarians.