[jamuko]

But.... the age limit was upped for alcohol as a direct result of the effects of being drunk. It was determined for one reason or another that people below age 21 were not capable of handling the substance with good judgment.

They tried outlawing it completely and that was a miserable failure.

For loli, there is no age at which you would be able to take it better than another.

I don't think I'm forming this argument very well, but the point I'm getting at is that the alcohol "bad apples" scenario isn't a close enough parallel to this one, so it doesn't really make good backup for your argument.

Edit: I want to make clear that I mean no offense with any of my arguments; a good debate is no fun without someone on the opposing side. :P