1. I thought it seemed like a good idea in certain situations. But, I think I understand how it can be a problem or useless also when it's preinstalled and not removable. I like @hosejockey61 's idea of using a small piece of fire hose. So much so, that I'm headed to eBay to see if I can find a reasonably priced small piece.
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They work exactly as well as you are able to keep the hose section where you want it. Once the hose rolls over and the winch line falls off of it, they offer no protection.