Anybody, that is, who had the skills to tap into the ad hoc wireless networks that popped up during the conference.
Airfense's monitoring of wireless nets at the conference found 315 ad hoc networks, with over 60% of those running long-vulnerable WEP security protocol.
Benefit of the doubt seems appropriate here: My guess is that the majority of the security pros at RSA knew exactly what they were doing, trading the convenience of ad hoc access for the risks they took.
Question is, are they taking similar risks with your business networks? And if they're the ones with oversight of those networks, how would you know?