I'm speaking from life experience and people I have met. At the end of the day at 16 you are still a kid you're not gonna see things as I see it. After a bit of life experience and meeting more people you will realise.
I've seen it happen to so many people first its a joint every now and then, then it turns into a couple of joints at the weekend then it slowy creeps into the week then eventually they want something a bit stronger like a pill or a tab of acid.