You people are absolutely ridiculous. Look at what this scanner does; there is no image even show. All it does it identify is someone is carrying potentially dangerous materials. How exactly is that any kind of attack on your rights or privacy? Oh no, they're taking away your right to carry a bomb or a gun onto a plane. Oh...wait...
There is no liberty, NONE at all, being sacrificed here. The biggest sacrifice is a little bit of time waiting to get onto the plane. If you don't consider extra safety worth that, then, well, maybe they should have special "paranoid libertarian" flights that don't require passengers to go through scanners. The rest of us can have the extra security at no cost to ourselves.
And all of you saying that it's still possible to bring down a plane, you're absolutely right. No security is absolute. However, if making it more difficult on terrorists means that over the next decade, we have one or two incidents of terrorism, instead of a dozen, then those lives saved are more than worth it.
Get over yourselves.