I get dozens of spoofed phone calls a day.
I have to answer them because I get some legitimate calls from unknown numbers.
The do-not-call list is a comical joke. The FCC is useless.
I don't see anything that gives me any confidence that anybody takes this seriously, other than the recipients of the calls.
I do not believe that this is an insoluble problem, but it will probably be expensive. Impossible and expensive are two different things.
I think Verizon (and the rest of the providers) should be more proactive in solving this.