At 18, you can't sign a lease without a co-signer, you probably can't rent a car. You can't purchase alcoholic beverages or tobacco products in the US. Yes, you

At 18, you can't sign a lease without a co-signer, you probably can't rent a car. You can't purchase alcoholic beverages or tobacco products in the US. Yes, you can join the military, but there you spend time under very close supervision. Universities used to use the term "in loco parentis": I can see a deferral of admission being a suitable equivalent of screaming and taking the computer away.