What do you think on building a celebrity site?

Hi,

I am wondering if it is legal to buy a celebrity domain name, like firstnamelastname [dot] org
I am not sure if they can sue me for that or make me erase/delete the site.

I also thought of celebrity domain like that: firstnamelastna [dot] me OR lastnamefirstna [dot] me

Please share your thought.

Thanks,
darklich.