It's just the kind of thing that Facebookians (sorry, I invent words. It's a disease) absolutely love, and millions of them have installed the app. But there's a catch. Because in tech, there are free lunches. Namely, in installing the app, users are basically giving the developers - in this case Vonvon, a Korean company - carte blanche to raid your online profile and do whatever they wish with the data. Sorry, your data.
CTVNews.ca ran the following story today: Privacy experts issue warning over Facebook 'Most Words' app
My three words of advice: Just say no.