I believe that while those in favor of this have valid arguments, as long as the age of legal consent and the age at which one can volunteer to fight for our country, 21 y/o is an arbitrary number. Why should you be held accountable for your actions as an adult (18+), be able to sign legal documents and be eligable to risk your life in the service of our country, but not be able to enjoy all of its freedoms? "Wait a couple of years until you're more mature, Corporal" Does this make sense?