You're mad because the state of MD won't let you ride your moped on public roads until you are of age?
You claim that you are too mature and responsible for some bulllshit law, and that they should make exceptions for people like you?
I think being mature is not objecting the law, it's understanding the law in this case.
If you don't think it's fair, fight to change the law and quit wasting your time being defiant with strangers on a moped forum. Responsibility is the accountability of your actions...that's what makes you mature. Sorry bro, but judging by your attitude in the thread, perhaps the state made the right decision to establish that law.