https://www.cnet.com/news/facebook-bans-sites-that-host-blueprints-of-3d-printed-guns/

Facebook, the world's largest social network, said Thursday it's banning websites that host and share blueprints of 3D-printed guns.

"Sharing instructions on how to print firearms using 3D printers is not allowed under our Community Standards," said a company spokesperson in an email statement. "In line with our policies, we are removing this content from Facebook." BuzzFeed News reported the move earlier.