I don&#x27;t think this is a <i>very</i> hard combinatorial problem. At least last time I flew, they scan my boarding pass when I&#x27;m pretty close to the scanners. They&#x27;d just have to pick me out of, say, 50-100 other scans. And once they establish decent time data on BP scan to body scan correlation, they&#x27;d be able to narrow the field further.<p>I agree with you, though, that your last point makes this moot. They&#x27;re too bumbling for me to worry.