This is similar to the 1st Amendment defense in that if the famous person’s name is used in conjunction with, say a legitimate but not “official” fan club attached, then the use may bb deemed a fair one.

If you represent a famous person, it is important to USE their Trademarks, get all possible URLs and don’t forget the NET and COM ones.   Be sure this is the ONE AND ONLY fan club sit to call itself the OFFICIAL Famous Person Website” !

A often sought remedy for others using the URL is a disclaimer and link to the official website.