There's anonymity, fraud, and strong guarantees of identity. I'm fine with 1 and 3. There's no reason for the phone company to have a knowingly spoofable caller

There's anonymity, fraud, and strong guarantees of identity. I'm fine with 1 and 3. There's no reason for the phone company to have a knowingly spoofable caller ID system when it's already being used so heavily for 2.