I opted out of backscatter back in the day (and looking at the facts retrospectively I feel validated in doing so, for example the miscalibrated units found to

I opted out of backscatter back in the day (and looking at the facts retrospectively I feel validated in doing so, for example the miscalibrated units found to be spitting out 20x more radiation than designed). I don't opt out of Millimeter Wave today, as I'm yet to see convincing scientific arguments or evidence that they're unsafe, or what the mechanism would be outside of mild tissue heating. I do choose to close my eyes when scanned though, take that as you will.