I suppose there must be.
Some people have to much time on their hands.
Try as I might, I can't think of one person I would want to investigate, but then, I'm not very nosy. Other than in financial matters, privacy on the Web is not a big concern for me. If you have nothing to hide, digital snoops are not really much more than an aggravation. However some folks beg to differ. Privacy paranoia didn't start with the Internet, of course.