No, I think it's a bit humorous because coffee is and always has been widely known and accepted to be served piping hot, often near boiling. Same with tea and mate. If you order a pot of tea from any decent shop or restaurant, it will be served full of freshly boiled water. The closer to boiling the better. Do you think all teapots should have big warnings enameled on their sides as well? Should all knives have "WARNING: SHARP" engraved on the blades?