I'm not quite sure you are understanding the concept. granted, education works best, but scammers don't usually spoof numbers that are already being used (legitimate phone numbers that are linked to real people).
think of an autodialer dialing numbers one after another. starting from 000-000-0000 and incrementing by 1 digit each time it completes a call. it might take a while to go through all available numbers, but each time the number states it's invalid or you get a fast busy (as in the case with a lot of these scam numbers) it would be adding that number to a data set that could be used to prevent that number from completing a phone call and furthermore prevent if from being a nuisance to you.