The government using the info without a warrant would clearly be bad. Other non-benign uses I've thought of: supermarkets sharing your shopping habits with heal

The government using the info without a warrant would clearly be bad. Other non-benign uses I've thought of: supermarkets sharing your shopping habits with health insurance companies, so you get higher rates if you like beer and fried food, or banks checking your buying habits before issuing a home loan, denying the loan because your habit of buying frivolous expensive things makes you too high risk. So I see that there are possible bad uses of the data. But I don't see us heading in the direction of those bad uses. Hopefully our lawmakers will help protect our privacy while still allowing useful business analytics happen -- there's a balance to be had.