The point is, as you concede, that the line inside my house is MINE, and not community property.
But in any case, that phone which you use, is still part of an overall system,
Not those crappy little parts (that is, phone line) inside my house which are my property and responsibility, according to the phone company. My crappy little parts might be connected to the system, but they are not part of it in the sense of ownership.
and you wouldn't be able to make any phone calls at all if you weren't part of that system.
More to the point, the telemarketers aren't able to make any phone calls at all to me without going through (using) those crappy little parts in my house, my private property.
So if I say that my crappy little parts, which even you admit I own, are off limits to telemarketers, by what right do they trespass on my crappy little parts?
What gives you a right to trespass on their right to earn a living on the system their efforts and hard work built. Industry built the phone system, not tidy-diaper thinking and intolerant petualance. You even have a right to not have a phone at all. You can turn your phone off. You can screen your calls, you can get an unlisted number and be serious about not giving it out. You can teach your kids to delete the hangups, though most telemarketers don't leave those. Why should they have to turn off their livlihood because you overreact, or because big government promises to scratch your itch. I wouldn't do it if I were you. You will no doubt be sorry some day for it, and you will most likely get what you deserve, whatever it is, but don't count on actually wanting it when it arrives.