The TSA's new scanners

"Unreasonable" is subjective.
I for example have already stated I see nothing unreasonable about scanning me in a non-intrusive manner for weapons.
Forgoing that to be patted down in the name of modesty is an active choice.

4th Ammendment isn't even relevant here. We're not talking about officers randomly pulling over people without warning and strip searching them on the side of the road for kicks. We're talking about an institutionalized scan all passengers are equally subjected to. 4th amendment doesn't apply to searches at borders or airports except to require " \searches that intrude upon a traveler's personal dignity and privacy interests, such as strip and body cavity searches, must be supported by "reasonable suspicion." " which again, everyone treated equally is met.

Subjectivity goes both ways and I feel like it's appropriate to err on the side of not violating people's rights.

As an individual, it isn't to the point where I would drive to a destination that is better reached by flying. But I have come to the conclusion that I would opt-out for the sake of not complying with the TSA and depending on my mood, I'm the kind of guy who might finish my pat-down with a snide remark about happy endings. Looking at the use of full-body scans as a new policy in a vacuum, it's not particularly egregious. My frustration lies in the little things- subjecting children to the scanner/pat-down (what do you say to them after you've taught them it isn't okay for strangers to touch their genitals or take innappropriate pictures of them?), Chertoff's brazen conflict of interest, the fact that our national politicians are exempt when flying publicly, the complete lack of discussion on how we could do this better, the fact that I don't feel any safer, and the question of what comes next when some guy beats this system. Sure, everyone else on my flight may get some peace of mind knowing I've been scanned, even though I know I have no weapon on myself.

After giving it a little thought, you're got some truth in what you say, and I imagine a 4th amendment argument would be unlikely to hold up in court, but that really only serves to disappoint me more.

tl;dr
Politcally speaking, nothing scares me more than an Orwellian future and if we don't fight it over this, what are we going to fight against it for?