How do you go 3 years collecting personal information and just now realize it
Fragment of a discussion from Comments:Google mistakenly collects private data from Wi-Fi networks
Actually, I was watching the news yesterday, and apparently, anyone can see your Facebook profile (if you accessed it) on a public wifi network with a quick, legal program. So I'm sure Google must've gotten that sort of thing if the unlucky person was on Facebook as the car passed.
All in all, Google fail. Oh, and review your code. :P