The thing about this case is that IMDB was working off *publicly-available* information.
It's not as if they hired a PI to go digging into her past and violated her privacy; they just tapped into a public database and fed the results onto their website.
As a more-or-less public figure she had no real expectation of privacy there or elsewhere.
Gotta wonder about the lawyer that handled the case for her, though...
I suspect he got paid upfront.
