This seems to be happening to me for the past several months, first on my Samsung Epic, and now on my new Motorola Photon Q. The trade press indicated a while back that the manufacturers were going to add this as part of the OS as a way to offload some traffic, basically switching over to any hotspot you happen to be near which is in your list. It is a real pain, since it empties your battery. As an example, when I am home I sometimes connect my phone to my own AP, so of course my AP is in my list. When I am not doing data ops with my phone, I don't want the phone connected to WiFi. However, since about February, 2012, every time I get near my home AP, the WiFi turns itself on. It sucks. Does anyone know how to defeat this "feature"?