But agreed, I am stretching this example very far now to make "water as a utility" conform to "Internet as a utility" - which maybe goes to show that they are not quite the same and might benefit from not treating them the same.
Considering that 8chan has a proclivity to be a haven for mass shooters, the site needs to be excessively curtailed regardless of whether they're affecting the businesses services directly or not just for the sole fact that they don't seem to police the people or content that are on the site.
For example, do you think a business shouldn't fire an individual after he committed a murder of some person who isn't affiliated with the company?