That is factual. That would be relevant if conference entry were being managed by snipers searching crowds.

Or if you're attending without a badge, which is what Nathan was doing. As someone who's done the same thing... they definitely check at a lot of conferences.

One of the few times I was caught was at a psychoanalysis conference where I stood out for being roughly 20 years younger than most attendees. I wish I had a badge in that case because I was very obviously called out due to my age alone.