I think more research needs to be done before we place any, under 18 regulations on pot. Much of the research that has been done in the past has been more or less for propaganda purposes only. I'm pretty sure I've read a few times that it has been proven that marijuana use for individuals under the age of 14 has lead to learning disabilities and personality disorders. Then again, there are so many variables for learning disabilities and personalty disorders or quirks I'm sure its difficult to pinpoint the exact cause. As a rule though, I would never willingly smoke or over a joint to anyone under the age of 18 anyway. 21 for some reason has been the excepted norm for being able to legally get fucked up in our nation and I assume if that's what we've got to work with, at least that gives a time frame. I would go so far as to say, I don't care if they legalize marijuana use for all adults over the age of 25, just as long as the stop this senseless prohibition. We're not going to get perfect legalization I'm positive of that. There will be a great deal of legal bullshit and of course the commercialization of something many of us hold to be a sacred god given right, but we have to get onto the porch before we walk into the house so to speak. People demanding pot be free to grow and sell and consume with no tax and no regulations are just as detrimental to the cause as the Dr. Liars, Pseudo-scientists, and politicians.