Earlier quoted context omitted.
I'd be fine with prison for phone spammers who ignore the "do not call" list. You could argue "free speech", but there's more to it than that - they're invading my space and time when I don't want them.
You can say anything you want, as long as you do not infringe on my rights, such as by consuming my resources (time, telecom services, fax paper, etc) when I explicitly said not to (via a Do Not Call listing, etc.) It's similar to a No Trespassing sign; you can picket on public property (free speech), but doing that on private property (when marked with a sign that fit certain criteria, in most states) might get you…
All of the arguments for “free speech” against platform content policies are exactly arguing for consuming someone else's reseources against their expressed direction, so it's provably false that that is sufficient to prevent people from arguing for entitlement based on “free speech”.