We understood your concern, and policy is really targeting server dedicate for hosting porn. Like what I mentioned before, we will not shut your site down just because one user upload a porn picture.
For hosting company not targeting porn, just generic web hosting, there should not much to worry about. Even in case that our EULA do being violated, we will contact you first to have it resolved in stead of revoking the license immediately. We do appreciate the opportunity to have your business, but we do not like some other companies who can do anything regardless just for making money.
For shared hosting, if you want to take customer who want to host adult content, you can put them on an server using Apache.