"Any "restrictions" placed on the use of such a light set are legally unenforceable and meaningless, though I argued above that they might be desirable as a means of clearly establishing no responsibility for someone else's misuse of the set." A good point, and something I hadn't thought of before. An analogy would be the idiotic warning labels that appear on all sorts of products from ladders to toys; the manufacturer has no way to prosecute you for standing on the top step, but if you fall off and hurt somebody else, the manufacturer is (at least in theory) protected from being a co-defendant.

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