So many of the military folks who won the revolutionary War, WWI, and WWII were criminals or misfits.  Sometimes, these are the best people to do the job.  Maybe the youth should work to make sure they are "unfit" in order to force the government to adjust the standards.  Then again, people who are not allowed to own a gun, vote, or enjoy many of the same basic rights their fellow citizens enjoy should not be fighting for the same system denies them their rights.