I say remove ALL warning labels and let Darwin's theory take it's course. We have far too many stupid people wasting our finite resources. Sure the Emergency Rooms will be exceptionally busy for a while but if you look at the big picture, they will be far less busy once things settle down.
It's said that "Ignorance is no excuse for the law", I believe the same should apply to the laws of Nature. If you are stupid enough to drag your BBQ grill inside because it's raining and you asphyxiate your entire family, so be it. Odds are, anyone that stupid will have stupid children too. Survival of the fittest was, at one time, the lifeguard at the gene pool. The examples could go on ad nauseum.