I don't think stockpiling qualifies as hoarding. I don't understand the purpose in buying 50 boxes of something you won't use, but as someone who is a stockpiler (well, as much as my student apartment allows me to be lol), I cannot express how much peace of mind having a stash of stuff helps. Especially as a college student. It's just nice to be able to know that you don't have to run to the store when you unexpectedly run out of salad dressing or whatever. You walk to the pantry and some more is there. To me it's just a smart way to shop, and there are plenty of other smart ways to shop. This is just the way I choose to do it.