It’s an unnerving experience as an adult. You’re going along, being a good savvy consumer just like you always thought was the right way, only to discover in a flash that you’ve been doing it wrong all along. Has this happened to you recently?

Sound off in the comments.

Hat tips to Cockeyed, Lifehacker and Metafilter who started similar threads.

Want more consumer news? Visit our parent organization, Consumer Reports, for the latest on scams, recalls, and other consumer issues.