https://techcrunch.com/2018/05/25/facebook-has-a-very-specific-pepe-the-frog-policy-report-says/

Facebook doesn’t ban fictional characters with hateful content as a rule, but interestingly Pepe the frog is well enough established as a hate speech symbol that Facebook has a very particular policy devoted only to the cartoon frog.

Motherboard got their hands on some content moderation policy documents from Facebook that show Pepe, a cartoon frog harmlessly created by cartoonist Matt Furie, has earned himself the bizarre honor of being the only cartoon that employees reviewing content are encouraged to delete when depicted in “the context of hate.”