Nobody is saying minors are stupid and irresponsible. Some are, but the entire point that seems to be totally missed is this;
UNTIL YOU ARE 18, YOU ARE NOT LEGALLY RESPONSIBLE FOR YOURSELF IN THE EYES OF THE FEDERAL LAWS OF CANADA.
The LAW does not give a hoot about your maturity. Respecting the LAW, however, does show maturity.
Clear? Saying you already broke those laws is not a good thing.