1. "Nude Body Scanners" is a common name for the backscatter machines, and is generally understood as such. I'm not sure if you're asserting that people are randomly upvoting this article on the off chance it contains naughty material, but quite a few people—here and elsewhere—are heavily interested and involved in the TSA's use of these machines due to their isolated and cumulative effects on civil rights, so it shouldn't be surprising that it's at the top.

2. The TSA is not the only system keeping terrorists off planes. We don't have a "double-blind survey" where half the airports were protected by the TSA and the other half weren't, so we can't make any kind of sensible comparison. (A better metric would be, "How many attempted terrorist attacks were directly stopped by the TSA during the airport security checks," and it's widely accepted that the answer is, "None.")

3. These new backscatter machines were not put in place immediately in 2001. A great deal of the time you've mentioned involved elevated security on the part of the TSA, but not specifically through the measures being discussed here, which decrease the actual security of the planes by allowing people to bring items through that would have been caught by earlier measures (c.f. the article being discussed.) A case can be made that the TSA's post-9/11 response has been useless and possibly harmful, but this article is specifically making the point that the backscatter machines are problematic.

4. There have also been zero hijackings in other countries, as well, and those countries have different (and usually much less invasive and less expensive) security measures. If we provisionally accept that it is the TSA, and not the other agencies involved, that is preventing attacks, why does it necessarily follow that the only way to keep planes safe is the drastic measures taken by the TSA? (I can quite easily rid my house of mosquitos by burning it down, but that doesn't mean the only or best way to keep my house free of mosquitos is arson.)

I have a magic rock that protects against Tiger attacks. How do I know it works? Well, in 38 years of carrying it with me at all times, I've never once been attacked by a Tiger! It's pretty amazing... if you want one, email me and I'll see if I can scare one up for ya. They're pretty hard to get so it might cost a little, but it's worth it for the sense of security you'll have, knowing that you never, ever have to sweat a Tiger attack!

That lacks a sensible baseline to compare against. The flaw that 9/11 exploited was the conventional wisdom drilled into everyone that, if your plane is being hijacked, you shouldn't resist, because hijackers just want some money/prisoner-exchange/whatever, and by resisting you'll only be putting your fellow passengers in more danger. Post-9/11, nobody believes that anymore, so the one proven hole was plugged.

You're joking right? A quick glance at http://en.wikipedia.org/wiki/List_of_aircraft_hijackings shows that hijackings in the USA are incredibly rare. There was the four in 2001, one in 1994, and before that the last one was 1978.

All I see when I look at those numbers, is that we're due for another one any time now.

You're focusing on the wrong thing. The problem with the American airline security system is the invasive nude imaging, needless radiation exposure, and the hundreds of millions of hours of human time it wastes annually.

Here in Japan, I arrive at the airport 20 minutes before a domestic flight, show no ID, take my lighter and PET bottle with me, and we haven't had any terrorist attachs either.