I'm surprised that everyone kind of missed the main point of the OP's rant.

Nobody has asked a few important questions here: Who is paying for college? Who pays the health insurance? Do you pay rent when you live at home? Are you dependant on your parents? Do you love and respect your parents as much as they love you?

Telling the boy to purposely be defiant may not be the battle he wants to choose. You've only got a few months of non-adult freedom remaining, you've made it this far. You can ride all you want in college and then after college if you still choose to.

But for now, obey your parents, while trying to explain you are trying to save money for when you go to college.