I don't need banks monitoring and selling my purchase history to their "affiliates", like insurance companies, so that they can build shadow profiles.

Maybe I'm buying vegan groceries, getting wheat grass enemas and giving my money to the poor. Or maybe I'm spending it on McDonald's, hookers and blow. Either way, it's nobody's business but my own.

The comment I was replying to was implying that in the absence of laws banks would have no incentive other than super humanitarianism for preventing obvious money laundering. That's beyond potential misuse. That's profiting of a crime out of pure greed. I know cynicism is currently fashionable but I would still expect most people to find that questionable.