This comment has so many problems I can barely begin.  Alcohol is legal, pot isn't.  You cannot compare pot and alcohol, they work differently in the body.  There is much data about the dangers of alcohol, but pot hasn't been studied as extensively, however it is accepted that it is detrimental to developing brains, can trigger psychosis and anxiety and increase the chance of schizophrenia.  Just because pot doesn't cause aggressive behaviour, as alcohol does in some people, does not mean it's safer.  40% of all DUIs are due to drugs other then alcohol, may be higher, depends how data is collected.  I for one would never use a so-called "recreational" drug that is known to help with brain seizures.  Also, I'm quite sure in the years to come we will regret legalizing the stuff.