Sadly, yes, I've seen that too. There's just some people that seem to have accepted the idea that the government is permitted to perform such searches simply because someone is flying.
A large number of those I've seen online who subscribe to this idea aren't from the US, however, and have an entirely different mindset concerning the role of government. Facebook friends are likely closer to home though.
I, for one, am bothered enough by that idea that I have no intention to board a plane until the searches are stopped. I've had people question me about the practicality of refusing to fly, but I've driven a third of the way across the country before, and the inconvenience of driving is worth the cost of not giving the government the chance to search me without cause, IMO.