I ask as someone who legitimately doesn't know (don't use them so haven't read), but does that violate the various social networks' dev terms? I've heard that F

I ask as someone who legitimately doesn't know (don't use them so haven't read), but does that violate the various social networks' dev terms? I've heard that Facebook and the like won't agree to you capturing Facebook data (messages, posts, etc.) in such a manner. Not sure if metrics are fine or what.