The do not call list is the phone version of the "No Soliciting" sign. That and nothing more. A telemarketer no more has the right to call me if I'm on the list than a salesman has the right to ring my bell when it's explicity posted that he cannot.
The do not call list is the phone version of the "No Soliciting" sign. No, it is a government-mandated entitlement: wired phone service with commercial call screening. The market already provides services like that, but you want it free from the government.