@lauren There's a big gap in my understanding of how scam callers stay on the network.
My uncle gets about three a day. All probably from the same company, because the prefix audio (the sounds their robocall machine makes patching through to a human being) are all the same. They call from dozens of different numbers.
Where has the phone network broken down that carriers can't just say "These numbers? They're scammers. Cut 'em?" The phone network isn't like the IP network where all you need is a computer and an Ethernet cable... Someone has to be signing off on these customers.