Using Common Sense for WiFi Sense
http://1drv.ms/1SVF6L8
What are your thoughts
Well, setup seem not that much different from smartphones or tablets, they are always looking for wi-fi connections as you move about. Some vendors have them set up to connect to any available wi-fi connection without notifying you and permanently remembering them. Offhand, Microsoft's iteration seems similar.
To know that would require further investigation.
[EDIT:] Wi-fi Sense appears to be allowing others to use your wi-fi connection, correct?