[kerkeslager]

I vaguely remember the yelling "opt out" in the early days of the porn scanners, but I don't think they do this at most airports any more.

I think you might be taking the agents' reactions more personally than they are intended: I'm sure that the TSA agents aren't necessarily happy because you're adding a task to their plate, and in busy airports they already have a lot going on, so it's understandably visible that they're stressed. But every one I've interacted with has kept it more professional than an eye roll.

Remember, the agents themselves are just not-all-that-well-paid workers. They aren't the cause of the problem.