I too witnessed the pill/potato bug snacking down on my starts in my raised beds last year. I was also under the impression that they only ate decaying matter. I have a theory for why this might be happening, maybe they're evolving, but maybe they're seeking the calcium in the plants. The reason I think that is because when I was helping my mom on a construction project the dry wall (gypsum) paste was all over the floors and the little buggers were going crazy for it. There were thousands of them muching. Just a theory, but maybe its a sign of calcium difficiency in the soil and other organic matter that would turn them to this behavior. I'm going to try the coffee ground method, thanks for the tip.
