Max Goldberg of YTMND fame, bought DustinDiamond.com in 2001. The real Dustin Diamond didn’t like this and proceeded to sue Max. Surprisingly, Dustin Diamond actually lost the case because the jury found that the website was a non-commercial fair-use parody. And, thus, ended the case of the only ever time that a celebrity wasn’t able to win their domain name, to the best of my knowledge.
Dustin Diamond is a jerk, anyway.