Surveillance pricing is when a retailer sets the price of something based on what they know about you: your address, your income, your interests, your 'demographic'. Lawmakers in Maryland made it the first state to "ban" the practice this week, though the legislation has conspicous loopholes and shields retailers from consumer lawsuits. For what it's worth, state governor Wes Moore immediately signed it into law . "At a time when our people are being squeezed by the cost of everything, especially groceries, Maryland is not just pushing back, but pushing forward," Moore wrote in a press release. A Federal Trade Commission study found that surveillance pricing, also known as dynamic pricing, is already in use : "Retailers frequently use people's personal information to set targeted, tailored prices for goods and services—from a person's location and demographics, down to their mouse movements on a webpage," wrote then-FTC chair Lina M. Khan.…