I believe most people, and especially cell phone users, are reluctant even to answer to an unknown number.
I believe I’ve read someplace in the past that conservatives are less likely to respond. But I couldn’t prove it.
Since I am in real estate and sometimes have business referred to me by satisfied clients, I am forced to answer calls from numbers I don't recognize. My cell number is on the do not call list, but I get several calls (mostly robocalls) a day from solicitors.