I'd say respect their wishes, particularly until you're 18 and are of the legal age to make these decisions on your own. It's better to be honest, and respect their wishes than to do it behind their back, besides, it'll say a lot about your maturity for the rest of the community.
Edit: Dammit, beat again... slow typing today...
Ubique Quo Fas et Gloria Ducunt
Alternatively, I could just light you on fire. - Me