Re: not sure how to read this
is that a reasonable statement, or a populist appeasing rant ?
That's been an accurate statement since the implementation of STIR/SHAKEN protocols, procedures, and the laws like TRACED Act that mandated their use:
https://en.wikipedia.org/wiki/STIR/SHAKEN
"The FCC also requires all providers—regardless of whether they have a STIR/SHAKEN implementation obligation—to institute robocall mitigation programs to ensure that they are not originating or transmitting illegal robocalls."
https://www.fcc.gov/call-authentication
Circa 2021-2022, carriers were required to stop allowing customers to spoof CallerID of whatever source phone # they wanted, and get proof that the customer owned any phone # they would be allowed to spoof. But there probably is some legal wiggle-room in how aggressively telcoms are expected to respond to block transmition of spoofed calls from less-scrupulous small (usually foreign) telcoms.
And yes, the SHAKEN acronym is rather tortured. An accurate initialism would be something long the lines of: STIR/SHAIT