In the past, when "private property" was literally property, a whole town owned by a company (used to be very common), American courts decided that the company

In the past, when "private property" was literally property, a whole town owned by a company (used to be very common), American courts decided that the company owning the town couldn't restrict free speech in that town. These days the "property" in question is just a fancy telecom system. And it's already an established principle in America that the phone company doesn't cut off your line just because you're talking some political smack.