I get the feel this article was written by someone who's never actually BEEN in Vegas during these conferences. It's not at all uncommon to encounter skimming hardware on ATMs and fake cell sites that try to exploit and brick your phone. The likelihood of seeing either of those any other week anywhere in Vegas is near-zero.
Ethics my ass. The general opinion of the locals is that if the Paris casino burned down during Defcon with all the exit doors mysteriously barred, nothing of value would be lost.