Look at it from the opposite point of view. Are you prepared to say:
Cigarette packs need no warnings, people should know they are bad for you. No warning on any packaging (hazardous or not) if someone is stupid they deserve what's coming to them. No labels on food, who cares how much fat it has, you wanna be health conscience? Eat an apple, fatty! No warning signs on electric booths, cliffs, road traffic hazards, shoot on sight areas, people should know those things or die if they are "stupid".