Clicking a link on some request on facebook (that I really don't use much), I'm asked :

TripAdvisor would like to access your email address, work history, status updates, education history, hometown, current city, photos, likes and your friends' work histories, status updates, education histories, hometowns, current cities, photos and likes.

I'm not really "asked", I'm more like informed and invited to click "Okay"... still can click the grey cancel button if I'm a weirdos.