Comment by dheera

One way might be to list a number that you monitor as their "emergency contact" but list a virtual or other no-pick-up-policy number for all other forms.

The only issue is that a friend once listed me as their emergency contact for a gym membership, but then the gym made telemarketing calls to me with it. There should be federal law protecting emergency contact numbers from being shared or used for any reason except an emergency.

Alternative method might be to set up a Twilio workflow that says "Press 1 to reach me" and only forward to your actual phone after that. That will probably eliminate all the robocallers but not the human telemarketers