[toomanybeersies]

Why are there so many people assuming this was a malicious actor?

It was most likely some organiser just organising swag for the conference, who didn't think about the implications because they weren't aware of them.

Never attribute to malice that which is adequately explained by stupidity (well, ignorance in this case).

Why would the North Koreans go through the trouble of buying a bunch of fans on Aliexpress just to make some security people freak out?