I'll keep your points in mind.

I would only insist on making a distinction between "a public form" and "the public forum"

As an owner of a machine, I see no reason I should be forced to host some conversation I consider harmful.

OTOH I would encourage ISPs to maintain a common carrier status just out of pragmatism. Once you memory-hole connections to some IP address, I think you become responsible for the content you serve. All or Nothing.