All this stuff about Google "accidentally" listening for and saving all this data has made me wonder if other large super-corporations (MS, HP, WalMart, Intel etc etc) send unmarked vehicles around certain areas to do exactly the same thing!?
I forget how Google got caught in the first place, but it seems unlikely that an unmarked vehicle that's drawing no attention to itself would get caught while driving around in a city or suburb listening for open WiFi and saving the data.