[wtallis]

> so that carriers could block spoofed calls from overseas without fear of liability

I don't really want my carrier deciding what calls to block. I just want them to ensure the veracity of caller ID data so that I can perform useful blocking at my end. There shouldn't be anything stopping them from removing fraudulent and unverifiable caller ID info from the calls they route my way. That leaves me free to block calls that lack caller ID info, and I'm assuming all the risks that entails.