I'd love this - simultaneously beneficial to consumers, improving the market (reducing information asymmetry), and not something that laissez-faire-market-types

I'd love this - simultaneously beneficial to consumers, improving the market (reducing information asymmetry), and not something that laissez-faire-market-types can complain about (because you're not restricting what sellers can do, technically - you're just forcing them to reveal more information about their product, and then it's market forces that actually deal the killing blow). More ideas: "online account required for use", "collects location data", "phone call required to cancel subscription", "memory use: 350 MB" (just like calorie counts!), and so many others...