Nah you'll be ok. I was going to get a ride somewhere with my friend and I was like, "That's his brother, right?". He laughed. The guy is 18, but his face looks like he is 11, and he's below 5 feet....
actually, depending on where you live, you have to give the cop a reason to pull you over. Here, it is against the law to pull someone over just for looking too young. Usually, if like 10-14 year old kids go out joy riding, they drive like shit and will get grabbed.