In reply to David Lane.

Hi David,
I just read an article about Cisco's newest security stance, which addresses many of your (and my) concerns around WiFi security. Network Behavior Analysis (NBA) which was around in 2009 with companies like SourceFire, Lancope, Mazu etc. first addressed this concern to my knowledge with their in depth analytics and monitoring. Cisco has since embraced this technology and made it pervasive with their NGFW, ISE, NetFlow, etc. giving you a single pane of glass to see network behaviors and stop them rather than just alerting by following the trail, seeing anomalies, and staying with the flows rather than only seeing some action at a single point.