Speaking strictly as an old guy: multiple ages of majority is an insult to young people. If you're old enough to get married, sign up for credit cards, join the military to defend the nation, and the like, you should be old enough to enjoy all our nation's civil rights. Treating young people as partial second class citizens is no way to encourage people to be good citizens.
You can tell them I said so.
No tyrant should ever be allowed to die of natural causes.