The linked article says Rand Paul set off an alert on a full body scan, then refused to be searched. That sounds more like his "protest" is trying to cover up something he didn't realize was carrying after the fact - otherwise why was he not protesting the body scan in the first place.
Not necessarily. Last week, I opted out of backscatter, and the pat-down triggered an "explosives detected" alert. I was in a hurry, but otherwise would have wanted to be much more resistive of the private search I underwent after that.
Because it's absurd. Because I do not carry or interact with explosives.
I see no difference in principle between a search using someone's hands and search using X-rays. If one objects to rights violation during a pat-down, why doesn't the same objection apply to backscatter?
A backscatter machine in some ways is even more intrusive than a pat down as it can generate higher resolution images, which can be saved. Furthermore, there is a small, but non-zero risk of bodily harm from the scan -particularly when you multiply the risk by the number of trips and passengers going through the procedure, even a one in a million chance would cause harm far in excess of the risk of terrorist threat that the search is trying to mitigate.
