Knowing how thuggy our government is toward conservatives (sticking the IRS on us etc) is it any wonder we don't want to give our political feelings to strangers?
I still use a landline and also have a cellphone. Another disadvantage is caller ID. Personally, I don’t answer a call if I don’t recognize the number and that mostly includes toll-free numbers. So, yeah, getting an accuracy in polls in today’s technological world is difficult. Years ago, I used to do polling for several candidates, and we would ask the person on the other end the same question in different ways. We would ask the person if they were likely to vote or not, give them the choice between candidates - then read them something negative about the candidate they wanted defeated and then ask them after knowing that - would they still vote for so-and-so. I don’t know how these polls are conducted, but that was my experience.