> 20-somethings (whatever the correct term is for that generation) don't answer the phone for numbers they don't know
Not just 20somethings. I'm in my 50s and lots of people in my general age group also refuse to answer the phone when an unknown caller calls.
Even fewer will consent to taking part in a poll even when they do answer the call, in large part because so many of those calls are push polls and other political marketing rather than real polls. That means they're no different than other scam spam calls.
