That's an excellent question.
Thanks
How about exhaustion from work? Let's ban overtime, and limit daily hours to 4 while we're at it.
In fact, legislators have already dealt with this. The law limits the standard workweek to 40 hours (even shorter in France), working overtime is something that's pretty heavily regulated, and child labor laws prohibit all work for kids under 14.
When adults work and earn income, there is less of a need for kids to work and earn income, but the opposite dynamic exists for controlled substances: when adults gain easier access to them, minors also gain easier access to them. (For most of the people who voted for Amendment 64 here in Colorado, that was an unintended consequence; but for some it was very intended -- "power to the babystoners!") Thanks for making points that support my position.
Where do you draw the line?
I thought I had made clear that permanent loss of an average of 8 IQ points is too high a price to pay for the freedom to get stoned (a freedom that people who have their sobriety don't even miss). Now I ask again, where do you draw the line?