I'm also wondering what the response would be to a woman wearing feminine hygiene products. Are they gonna ask her to drop her panties and show the blood-stained item as proof? If they don't, doesn't that just defeat the purpose of a screen since anybody (well, any female, in this case, I guess) could claim "It's just a pad."
I hope so, we'll see what level of invasion Americans will put up with. Since we don't know, let's presume they are. Is that intrusive enough?