That will depend on how much resentment the food photo artists will feel. Plus a lot of social media companies start with fringe groups but then grow more mains

That will depend on how much resentment the food photo artists will feel. Plus a lot of social media companies start with fringe groups but then grow more mainstream over time. You are also assuming the censorship is only of people calling for violence. This morning Ron Paul's facebook page was blocked. I don't think he's ever called for violence. If the loudest voices on the left expand their definition is hate speech more and more, the less it is the fringe who get banned.