Nuisance calls

I dont get hardly any at all on my cell phone. I dont share that number with too many people. Friends/family/work but thats it. Our landline we get more spam/scam calls. 99.9% of all scam phone calls are generated by a computer that a human is monitoring. They now have come up with a program that uses a legit phone number as a cover, but its not really that number at all.
Kim for example you get a call on your phone. It shows "Bumper to Bumper" as the number, you answer it but its from "Revenue Canada", or "Visa". They basically have devised a program that "cloaks" their real number.
It will never end, just like scamming will never end. And they dont have to do it in person.
Keep your cell number private, NEVER put your cell number on anything.
Sign up for the Do Not Call list, what can it hurt? We did with our land line once the list was it was devised.