Hmm well you are wrong on that count that "hosting" is not illegal. That's the same argument that 'holding' stolen or illegal property for a 'friend' is perfectly legal.
Or another way to put it is, why then are child pron or death videos removed if the person is merely 'hosting' the content?
So then, 'hosting' is illegal as you are well aware of the content yet choose to do nothing to stop the distribution of such content.