Paranoid or what? Are they going to use the info retrospectively if something actually happened. Surely it would be much easier to do this at the boarding stage, unless of course it is evidence they want. What next - counters on the bog roll to make sure you do not use excessive amounts, cameras to check the hosties don't give away too much free beer? Why not go the whole hog and DNA test everyone when they book and crossmatch their DNA at the gate!
Only in America (bless them)