Technically the owner of the hosting system. And legally the state where the hosting system is stated in. And morally the owner of the hosting system. It is everyones choice, if one wants to commit illegal acts. But I would never want to host pictures or videos where people are humiliated. Not would I allow people on my servers, which do not respect warnings, after they have been discriminating to others individually or against a group.

Give me any reason why one should respect bullying and racism for example?