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davidcyclebackWith celebrity name sites (ala www.georgeclooney.com), it depends on how the owner is using the site. If the owner likes Goerge Clooney and uses the site as an unofficial George Clooney fansite that can be okay. If the owner is using the site commercially, such as to sell T-shirts or pornography, that would not be legal and Clooney could take over the domain if he wished.
The key being that, while it can be okay to have a informational site about Porsche or Bill Gates or PSA, you cannot use a famous person's or company's name as the devise that makes you money.