You would rather the government obtain all your tracking data from Google, Facebook, Twitter, other apps on your phone, discount cards, credit cards, etc. rather than writing your name and phone number down at the stores you go to? I mean, you don't even need to tell them the truth.
Personally, I'd rather have the choice to either write my name and number down at a store I choose to go to than have the government reading all the tracking data that is available about me whenever they want to.