There should be a moment when you're writing for Young Adult that you suddenly realise things, but what I'd personally say tends to be that you're focusing on that moment in every book.
Fact is, the #1 cause of death for teenagers are auto accidents. http://Bellhelo.com/__media__/js/netsoltrademark.php?d=kwba.or.kr%2Fbbs%2Fboard.php%3Fbo_table%3Dmenu0406%26wr_id%3D282503