Do you think your phone company should be able to deny you service if they don't like the things you say on the phone?

Any company should be free to deny you service for any (or no) reason. Consent should be able to be withdrawn by anyone at any time.

And what happens when there's only one ISP in your area and they don't like that you post to hackernews and choose not to do business with you?

Then the laws preventing multiple ISPs should be fixed, and the anticompetitive malicious actions of the incumbent monopoly punished as criminal.

Starlink is also an option, and soon there will be Starlink competitors too.

This is a very funny response. Elon Musk has shown that he's extremely quick to censor speech on Twitter / X that he personally disagrees with. He also declines to fight government requests to censor speech, as opposed to Twitter prior to his ownership.

Starlink is the last place you would be safe from being silenced.

https://theintercept.com/2022/11/22/elon-musk-twitter-censor...

https://www.socialmediatoday.com/news/twitter-approving-far-...

If I made a lot of unwanted phone calls and people complained to the phone company, they would definitely cut me off. As it should be.