Extra Long Receipts

The other day Lord Baldemort and I went to Blockbuster since Redbox didn't have any good movies. I paid and walked away with one movie and 3 receipts. For some reason each receipt was extra huge too. I looked at the receipts and honestly couldn't tell why I needed 3. I then went to the local grocery store and bought about 10 items. The cashier handed me the receipt and it was nearly 2 feet long. Why? I couldn't believe it. Do I really need that much paper to tell me what I bought? It's not like the coupons were on the receipt; those came separately. I tried to think of reasons why stores are giving out so many receipts and why they are so long.

1. Perhaps they are worried that you might get stuck on the side of the road without toilet paper. I think some wrinkled paper receipts could be handy in a situation like that. I'll do a test to find out if the receipt is shorter when I buy toilet paper.
2. Stores could also be worried that your car might skid out of control and leave you dangling on the side of the mountain. These receipts could be fashioned into some type of rope so you can repel to safety.
3. An unlikely, yet plausible reason could be that companies know you might want to construct a noose. If you are like me and you save your receipts to be reconciled later, you will probably go crazy as the receipts get longer and fill your wallet/purse.
   

Why else are these receipts so long? Why do we need 3 copies?