Yeah, scammers will try anything at least once or twice.
Typically, we do not answer the phones unless it is a number we know, everything else goes to VM. Although we do still have a home phone as our main contact number but we use an answering machine so we can screen the calls. Let it ring, once the answering machine picks up we just listen to see if it a robot or someone we know.. Robots typically don't speak until you speak and often are able to distinguish between prerecorded message or a real human on the line. Sometimes they do start speaking and we simply stop the recording and delete it..
Our sticks and bricks phone company does offer a call screener, requires the person calling to enter a specific number that you setup before the call is sent to your phone.. Great idea, but may cause issues with DR appointments which use Robots to call you with reminders or changes to appointments.