The studies made on many countries shows that, on the contrary, the more marijuana is repressed, the more it is consumed.let legalize marijuana everybody smokes it anyways no matter what !
All the evidences are that those would would sincerely protect the kids from marijuana, should be the one defending the most the stopping of the prohibition.
In the USA, it looks like everybody will smoke it indeed.
You need an ID to bought a legal drug, and sometimes a medical prescription.
You don't need an ID to buy an illegal drug, and sometimes they will come at you quickly, especially if you are young.