Newsday article about paint that can block cell phone signals. Note how the Wireless Association spokesman is opposed to the idea.
He does make some valid points. Doctors will not get emergency calls. But people do have the right to control their own property.
I think the thing to do is enhance cell phones so that they recognize where they are and what rules the property owner wants respected.
GPS is being added to phones anyway. The company could look up the rules before ringing the phone and, if the rules prohibit all non-emergency calls, ask the caller if it is an emergency. That would cut down on the number of calls. The property owner could register the rules with the county which keeps track of who owns what land.