Ok so let me get this right. You obviously are either extremely clumsy or not at all careful with your N900 dropping it - you then placed it inside a pocket with another hard metal object and scratched the crap out of it, and yet somehow this is both Nokias fault and Zagg's

Please allow me to direct you to http://www.sadviolin.com

As far as scratching the device when you use your fingernails. You might want to consider some personal grooming because you must have some mad talon action going. I use my fingernails all the time on the N900 and have no scratches.