When you're staying in the same hotel as some of the best offensive hackers in the world, watch your desktop computer before it watches you. The Fountainebleau hotel in Miami Beach hosted the deeply technical and offensive-minded Infiltrate conference from April 15 - 17, and The 280 or so attendees - including cyber contractors working for governments and penetration testers in private industry - were wary of using the hotel's WiFi , and the iMac presented an almost comical risk.