1) people's location data they weren't aware was being kept (dozens of stories and nuances now),
2) scraped SSIDs of WiFi routers from...the world...via Street View cars, said "Whoopsie"
3) collected MAC addresses via free terminals and hotspots in...NYC was it?
4) Allowed multiple cross-storage access bugs where users have accessed each others' shit in Drive....
Anyway, I fear you are not an authority on Google's effectiveness at preserving customer privacy.