These are the opinions I have formed from what I have learned about this topic and flight in general:
1) Security measures are never exact, so even with increased measures for pat downs and scans, there are sure to be slips. Since this is new, it's unsure as to whether or not these measures will make a significant difference or not. There is a very likely chance that after a few months/years, workers will loosen up and become less effective at spotting things.
2) Body scans and pat downs are much more invasive, but the biggest issue is our discomfort with the situation. If we didn't have such a prudish society when it comes to themes of sexuality and body images, we would care much less.
3) 70 percent of Americans can support these measures because of the high number of people who are Americans who do not fly. IMO, 70 percent of flyers do NOT support these measures, but I could definately see 70 percent of the total population.
4) The people who see the body scans and conduct the patdowns will be a majority of professionals who really don't care. Like doctors, they may enjoy seeing better specimens of the human body, but they will not do anything to make you more uncomfortable with the situation. Chances are, unless you're a regular at that terminal, you will never see that person again. So, as a result, who really cares that your man bits and lady bits are being seen by someone? They are NOT going to be taking photos and putting them on the web...
5) Airports in other nations are safer, like Israel, because of the way security runs. Background checks, great IDing, great scans, etc etc. The other reason? They conduct racial profiling and it has a great success rate for them. Our problem? Racial profiling is illegal and the ACLU will be ALL over that. I don't have the facts as to whether or not racial profiling works, so I also will not support it, but other countries are not nearly as lax as we are, even with our new measures in place.
6) The TSA should have announced this stuff well ahead of time to start getting people comfortable with it instead of just changing it one day and denying they are doing anything new and different. People as a rule are slow to change, especially in an uncomfortable and new situation. That's their bad, but it's too late now.
So, all in all, if you choose to fly, you have to suck it up and get used to it. It's how things are going to be and should be. I understand the inconvenience, but there also has to be an understanding as to how servere a situation could become if something gets by the scanners. Embarassment is a small price to pay in the long run. So, when you're being pat down or put through a full body scanner, just remind yourself, "I could have been accidentally arrested for a crime I didn't commit and forced to shower in group showers, poop in the middle of a room, and strip down in front of groups of guards." That would be far more embarassing than a TSA agent with a set of gloves patting you down.