The National Highway Traffic Safety Administration is warning people not to buy rhinestone-studded steering wheel decals, after several people were reported injured by the shiny decorations. A crash triggering an airbag sent tiny rhinestones into one person’s face and neck, while another person lost sight in one eye. Glittering metallic decals featuring all the major car brands’ logos can be found on eBay, Etsy, and a number of other online sellers.