Facebook was warned about app permissions in 2011
I built apps on FB back in 2011-2012 and was gobsmacked at how much data we got about the friends of our users. I also knew of several shady people building apps.  Because I saw how much data we got without consent, I realized other shady people could get that data about <i>me</i> via my friends.<p>Which is why I severely curtailed my FB use around that time.