That's what I would do, stay there. I wouldn't be a dick about it though, I'd simply explain that I don't mind being pat down, but don't want to be scanned for

That's what I would do, stay there. I wouldn't be a dick about it though, I'd simply explain that I don't mind being pat down, but don't want to be scanned for personal reasons. If it was obvious they were going to make an issue out of it, then that's when I'd calmly turn on the Periscope app and notify them I was streaming live video and audio, then sit down and see how it plays out.