Kryff implied that we should not have warning messages saying "Do not look straight to the sun using it" which would mean the ignorant could be harmed as they would not know they should not. Children, who are ignorant, not stupid, might think that sunglasses protect them from the sun. These warnings should be given, especially as there is an increase in parents not teaching their kids the basics (such as these) and more ignorant people are appearing the world.
Warning labels don't protect the stupid as they will do what's stupid despite (or even because of!) warning labels. Warning labels protect the ignorant, and as you say, there is a big difference, but you don't seem to get it.
You seem to be using definitions of "stupid" and "ignorant" that are the opposite of what they actually mean and what you've said doesn't make sense.
This is just like those â€œ3D glassesâ€ with a blue coloured â€œglassâ€ and a red one. They have a warning message saying: â€œDo not look straight to the sun using it.â€
I say: These messages are harming human kind by preventing natural selection.
Catbert would be a good advisor for those warnings.