"The problem with robo-calls is not bad people"

I beg to differ,  they are crooks trying to scam you.

And what proves this point is they hide their identity by spoofing the origins phone number.

they do not respect the DNC list, and pressing 3 to remove yourself from the list is a joke.

Lest make a distinction between Robo-calls and automated services.

Legitimate automated calls use a real number and can be identified. 

Caller ID will show that it is your pharmacy or a Dr. appointment reminder.

And as far as I concerned, that politician should respect the DNC list too

The network operators know exactly where the hacks are coming from, every bit of data has an origin and designation and software monitors activity closely. reports are generated and it is based on that data that they can "tag" the call as "potential fraud"

The conflict is when undesirable conduct brings in revenues. somebody is paying for the network time.

Fortunately, there is a solution. Verizon will sell you a service that will alert you when a suspect call comes in.

Why don't they just alert you or block them in the first place....

Let's see, $2.99 times 143.000.000 users is how much?

Its all about the money.