Hey, you're the one who is 15. You would be closer to the CREATION and G-D so I suppose you would know. I mean Mick Jagger smoked some pot and made a movie with Ed Anger back in the early sixties and they thought it was evil. It really depends on the crowd you are hanging with.
I mean some guy I was talking to the other day told me that masterbation was the root of all evil. This he told me, after 3,500 times at the flagpole. I always thought it was healthy and very benefitial. Sin is when you include a women in your mind and in your bed.
I wouldn't worry about evil. Pot is not evil, dude.