I notice a lot of junk from Facebook comes from "re-shares"; people sharing stuff from these crappy third-party groups that exist simply to make things viral.

I notice a lot of junk from Facebook comes from "re-shares"; people sharing stuff from these crappy third-party groups that exist simply to make things viral. I tend to block on sight, but wish there was a way to say "Automatically block shared posts containing videos/photos that don't originate from the poster or people in my Friends." I'm sure there are people that save these meme/viral pictures on their phone and re-post it, rather than just blindly share from these stupid groups, but not very many from what I've seen.