I have been telling people for years that you should not take quizzes on facebook. They are offered by companies to get information from you so they can sell it. It has now come to light that not only do these companies get to scrap your data (not just the answer to the questions you give them) but they get to scrap all your friends data.
So stop taking quizzes. Don't do it. It doesn't matter if they promise to tell you the comic book character you are most like. Just say no.
While we are on the topic of facebook don't share a story you have only read the the tittle to. I mean why are you telling everyone they need to read something you have not read.