Destiny is 16+. If any 16 or 17 year old has or develops these problems, the fault lies with you for not noticing it sooner, because they clearly have some sort of mental development issue. Any normal 12 year old is able to tell you that games aren't real. They'll come on Destiny after doing their homework, have fun with their friends and forget about the stresses of high school. Not go murder someone because they think they're ridding the world of the Darkness.