[StudentStuff]

With regard to #2, I covered in my comment to the poster your replying to that correlating partial names and the store location with registered voters from your state's freely available voter registry would de-anonymize most transactions in the dataset.

Nevermind that Google has location data for Android users (and Google Maps data on Android), and better profiles of people than the voter database has. Their attempts at user de-anonymization will likely be even more accurate.