In fact, using secure traffic and/or VPNs is the least important of worries, as an end user I can be taught to use these mechanisms for communication. The real issue here is that, if I understand correctly, all of a sudden the technical infrastructure of any relevant IT operation is exposed. As an IT manager this would be my worst nightmare: if I am running a WPA2 network, I need to make sure that there is no in-the-clear communication going on on these particular network segments.