I think its one of those "just depends" sort of things. While I'm sure a lightly-used iPad with a SmartCover could survive without scratches, I had mine on for the full year and traveled over 100K air miles with it, plus used it on construction sites extensively. Dust has a way of working into everything and I ended up with an absolutely tiny, almost invisible wear mark where the finish on the iPad had worn away to a shiny spot. You couldn't even see it unless you held it at just the right angle to light, but it was there.They don't scratch the iPad. I've used it by itself (no case, screen/back protectors) for a year and never had problems.
Ruined? I'm sorry the tiny scratched have made your iPad inoperable.i have an ipad 2 and the blue smart cover has scratched it not at the end but in the middle and i cant get it off just send me ur email and i can show u the photo
my ipad ruined!!!!!