Re: Cracking down on blocking, how about snooping?
@Charlie, your question echoes one I've heard several network security specialists ask. They point out that "man in the middle" attacks are quite possible in public WiFi areas and that the venues (like hotels and conference centers) should be able to shut down all unauthorized hotspots in order to protect their legitimate users from such attacks.
I agree that MitM attacks are real, but I still think that intentional interference is the wrong response. Users need to learn to protect themselves -- and protection against MitM attacks should be part of the road-warriors toolkit.