Can confirm that CBP is worse about this. I once had an agent insist that it was not possible to opt out, because the scan was mandatory. I pointed out that I h

Can confirm that CBP is worse about this. I once had an agent insist that it was not possible to opt out, because the scan was mandatory. I pointed out that I had walked past no less than four signs proclaiming the opposite (if you are a US citizen) on my way through the line. _He_ then held up the line as he walked off, consulted with someone who obviously knew better, came back and pouted while he verified my identity "manually."