Is it just me? If I thought someone was a terrorist wearing a mask or not, the first they know about it was either they'd be unconscious, then waking up hogtied with a gun in their face as I call security services, or they'd merely notice my absence because I'd have slinked off like the cat that just pissed on my shoes.
At what point do they think telling someone to take a mask off over the purchase of some Doritos is a threat eliminated?