Last year, the ACLU posted an article and picture to Facebook considering whether a nude metal statue should be allowed in a park in Kansas. It's still there, with skin aplenty. Facebook blocked the post and even banned the ACLU from the site for 24 hours. This girl accidentally texted her dad a naked picture of herself. From facebook nude photos, youtube porn videos, pinterest nudes, Tumblr sexy chicks, twitter selfies, etc. The person who posted the drive was a former Marine working for a defense contractor, said a Marine official who spoke on the condition of anonymity to speak frankly about the photos.
Facebook presumably imposes those rules in order to try to protect minors from child pornographers who troll various social media sites to collect such pictures.
Facebook Nude Photos