There's always the middle ground: If the number is blocked - a truly unknown number - send them to voicemail. Most marketers won't leave a voicemail - they'll

There's always the middle ground: If the number is blocked - a truly unknown number - send them to voicemail. Most marketers won't leave a voicemail - they'll just hang up. I voicemail-screen every call I get from numbers that aren't in my address book. 99/100 times, blocked number calls don't even leave a voicemail.