Pmb1226 in the ToS it says
"It's not okay to post violent or gory content that's primarily intended to be shocking, sensational, or gratuitous. If posting graphic content in a news, documentary, scientific, or artistic context, please be mindful to provide enough information to help people understand what's going on. In some cases, content may be so violent or shocking that no amount of context will allow that content to remain on our platforms. Lastly, don't encourage others to commit specific acts of violence."
so in the end,porn is allowed (as long as you're not making money and as long as its legal)
but they hate gore