Doubtfully legally "required" to avoid liability, but everything you can do to knock down arguments that you injured a third party by warning them of the danger

Doubtfully legally "required" to avoid liability, but everything you can do to knock down arguments that you injured a third party by warning them of the danger really takes the air out of lawsuits. You can point to the warning to discourage from filing lawsuits, to encourage dismissal, or to make winning a case more likely.