Marijuana only becomes addictive in high doses and if you do it multiple times a day for a long time, and even then the chances of addiction are slim. It's $10 where I live for a gram, which is one hour of minimum wage work. You don't know if your grades will suffer, I'm a 16 year old girl and I smoke from my vape about once a day if I have it. I can go weeks without it and I have. I'm smart, getting A's in classes like Science and Math, and I'm also smart enough to know when to smoke it (parties, friends house) and when NOT to(family gatherings, in public). The smell isn't even close to as harsh as to tobacco. It will NOT lead to lung cancer, the only reason smoking cigarettes does is because of the kerosene and gasoline and everything else that is toxic in them that go into your lungs. Yes everyone understands its ILLEGAL and if your parents don't want you to them talk to them about it. Ask them why they don't want you to and ask if you can make a compromise. My deal with my father is I can't smoke it by myself, only with friends and it can't be on property. But if your parents still say no then get a glass jar from a grocery store or a department store and hide everything associated with weed in it like a pipe or a lighter and papers and the weed itself. Make sure you hide it someone where nobody looks like under a pile of clothes or inside a pant leg. If you can't afford a jar then hide it in your shoes like an old pair of winter boots you don't wear.