Yes. There have been multiple front-page news articles in the NY Times in the past month about people getting spam texts from themselves. The fact that caller I

Yes. There have been multiple front-page news articles in the NY Times in the past month about people getting spam texts from themselves. The fact that caller ID is unreliable is part of the public discourse today. FWIW, I had to answer the phone at my first office job in ~2005, and the office manual has a section on how caller ID was not trustworthy caller authentication. None of this is new, and it is odd that a self-described security engineer would blindly trust caller ID.