Whether or not that reddit post is correct in this situation, they are banning regular wifi and 3g hotspots created by personal cell phones. Which IMHO isn't really draconian but pretty dumb. The olympics should be about athletics, communication, and celebration. Not brand recognition.
Seems bogus to me. Most of the important radios are in low the UHF band (<600MHz).
(I happen to know this, since I was involved in the frequency assignments for the stage management system of the main stadium, and the company I work for delivered all the base stations pre-programmed.)
http://www.zdnet.com/london-bans-3g-wi-fi-hotspots-from-olym...