My cousin (a college student) told me that he and his roommate went door to door asking everyone for a roll of toilet paper. After they had received about 8 rolls they stopped, knowing that they could get a lot more.
I would not recommend getting toilet paper, or any item for that matter, in this fashion, but it reminded me of the importance of having non-food storage. I believe that toilet paper and cleaners of all sorts (hand soap, dish soap, laundry detergent, all-purpose cleanser, etc.) are especially important. I buy toilet paper (just like food) in bulk when it is on sale.