So let's give the companies that have lied about the harms and effects of their product a heads up? They never gave people who died of cancer when they knew it caused cancer but denied it. Moving the age will just give the time for the business owners to get more of the money out and fuck over the smaller employees anyways.

I honestly think there is no solution that doesn't have negative effects. I'm personally very against the banning of something (especially a plant) as a solution to a problem as it creates plenty more problems (see America's drug problems)