> maybe that will push a critical mass of people to VOIP and leave this sorry industry

You realize that the vast majority of "robo-calls" are originated from Class 2 Interconnectwd VoIP providers, aka SIP companies like Twilio, Flowroute, SIPSTATION, SIP.US, voip.ms, and the like.

VoIP is the problem, because you can put an extraordinary amount of of volume down a very narrow pipe, with almost zero verification or validation on the technical if you are an active customer with a SIP provider. Becoming an active customer is not very difficult, either.