Update. I've had this feature on now for 11 days. The number of nuisance calls has dropped to almost zero. I had one call with a 12 digit number (I didn't answer) that may or may not have been legitimate. I believe the new CRTC rule effective Dec.19 would stop these. No 1-800 calls, no HVAC service calls, no charity calls, no polling calls, no political party calls, no this is the CRA coming to get you call either. No one has left a message on the Shaw Voicemail either. I will update again in the future in case anyone is interested.