If you're 16, you should easily be able to get a job. Spend your money, not your parents and if they wonder where it goes tell them to fuck off because its your money. Also, if you arn't going to do that but still are thinking about the job, just say you spend it on food when you go out, drinks, you loaned a friend money, movie theater, lunch at work, lunch at school, etc etc.

Try to get a locked drawer or cabinet in your room and keep your stuff in there. Keep visine on you, too.

Just remember this, you're your own person and even though they are your parents, they're not your master. If you enjoy smoking weed don't let their incompetence and ignorance overrule your fun. Smoking weed, or rather having fun is perfectly normal. Obviously they're doing that to protect you from the harsh world, they worry about you, blah blah blah... but if they really care then they'll let you have a little fun. Just don't be a retard and spend all your money, or go and get arrested. Be smart about it.