About having a qualified driver in the front seat.
During that scene where Meggy tells Combo "You know you're supposed to have a qualified driver in the seat" and he retorts "Are you going to report me?" and then just joyfully and in a playfully rude manner disagrees...
Did it not occur to him perhaps that on the road or anywhere else he is driving including that scene, someone from the outside could simply SEE him and the vehicle with the Learner (L) plate and the little child on the front seat and report him for that, even if completely without the aid of Meggy?
So based off on THAT alone, and Meggy could've also said "But what if someone sees it and reports you then?", should Combo have taken it into account?
I know Meggy in that scene was worried mostly because at the back he was being squashed but still...