No, but idiot-proofing everything is a waste of time. Do stove burners have warnings that appear when they're hot? Do cars explicitly state that they need to be buffed and waxed every once in awhile? Does your furniture say that it will need to be dusted and polished from time to time? Do lamps say that light bulbs burn out and need to be replaced? You shouldn't need to be told that just about everything that isn't disposable will need some general care. There is an entire market for cleaning or repairing glass, plastic, wood, metal, ceramic, stone, fabric, and just about anything else.
Anyone who owns anything plastic knows that it scratches. Whether it's a credit card or a shampoo bottle or a consumer electronics device, it scratches. People also know that shiny things show scratches more than textured things. There's only so much you can tell people if they aren't aware of these basic conditions.
Learn the lesson that people will sue them at every corner while being totally ignorant about materials science, economics, and/or reality? That journalists will jump on anything if it gets them attention? It is not a flaw. Everything made of this material has the same properties, and furthermore every kind of plastic in common use is susceptible to scratching. A flaw is a defect or shortcoming in a particular product. By your logic, everything that is not a diamond or sapphire is flawed because it can scratch easier than something else. It would be a flaw if and only if the iPod had shortcomings different than anything else made of polycarbonate.