Keep in mind that plenty of people who see this are getting a very different message: "go through the NoS, all is happy happy; opt-out and you're in for a bad time. The choice is yours".

There's a not-too-subtle message: opt-out and you are an un-American criminal and criminals should be frisked, and frisked roughly and without respect, because we've all seen on TV that only bad guys ever get frisked.