I agree with Mike. There's hoarding, and then there's being prepared. Hoarding is walking into the store and cleaning out the shelves of product. Anyone remember the toilet paper debacle? That is hoarding. Buying a couple tins of caps, every time you go to the store is being prepared.
I have about 1000 caps from Remington and RWS. I don't buy anymore, because I feel that if I burn through that many caps. I'm in big trouble. Same for powder. I have 12lbs on hand of various granulations. I found some the other day online, and ordered 4 more. 16lbs of powder should see me through any trouble. I don't consider that hoarding either.
Like Mike, I didn't buy any of it for re-sale. It is for my own use, and to be prepared. Now, there are people buying up everything and then re-selling it on places like GB. Those people I would classify as scalpers, not hoarders. They're trying to get rich off of other's misfortune. Lowest of the low.