What a reporter learned when McDonald's handed over a 'McDossier' of customer surveillance

Joining a fast-food rewards program can feel like a simple exchange: sign up, save a little money, get the occasional deal on fries or a drink.

But a California journalist's experience suggests those discounts may come with far more data collection than many customers realize.

Here's what to know

Using California's privacy law, the reporter asked McDonald's to turn over the information it had stored about him.

Wired reported that the response was a 515-page record — dubbed a "Supersize McDossier" by Futurism — covering years of orders, reward-program activity, and company projections about his future purchases.

Rather than stopping at a list of past transactions, the file laid out what McDonald's expected him to do next.

It estimated 2.16 visits over the following six weeks, an average check of $13.49, and $29.15 in total spending during that period. The records also sorted him into marketing categories based on his habits.

McDonald's identified a large Diet Coke as his top item, tagged him with occasions such as "Food-Led Afternoon Snack" and "On the Go Lunch in a Rush," and gave him an attrition score of zero, a sign that the company did not expect him to stop returning.

As Jeff Chester, the head of the Center for Digital Democracy, put it: "McDonald's secret sauce is really commercial surveillance."

Other privacy experts said that this degree of monitoring may feel startling, but it is common in major loyalty programs.

McDonald's said it uses purchase history "to provide a more engaging, personal customer experience" and added that customers have privacy options under its policy.

More background

At its core, the file took years of app activity and turned it into a profile meant to forecast future behavior.

According to the report, it logged orders, locations, loyalty-point totals, offers delivered through the app, and scans connected to McDonald's Monopoly promotions.

Over time, those everyday interactions helped create a more detailed picture of the person making them. That kind of system illustrates the advantage companies can have over their customers.

Ryan Calo, a professor at the University of Washington, told Wired, "You're mediated by the technology."

He said consumers are operating inside a setup built to maximize profit. The discounts attached to loyalty programs can make them seem like a straightforward way to save money. But at the same time, they can serve as surveillance tools, gathering patterns about where people go, what they eat, and how likely they are to come back.

What can be done?

Here, California law gave the reporter the right to obtain the McDonald's data tied to him and then ask for that information to be erased. Experts said the process should be explained more clearly before people enroll.

Lorrie Cranor of Carnegie Mellon University said that companies should give fuller sign-up disclosures about what enters a consumer's "permanent record" and the kinds of inferences that may be drawn from it.

Cranor told Wired, "The 500 pages is kind of a wake-up call. But it's not in a format that people will readily understand."

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