Here is the hunting regulation that some say applies, although some google searches say it has not been used on people for just loaded magazines in the car.
(1) A person may not shoot at any species of wildlife from an automobile or other vehicle or, except as provided in § 4-203(b) of the Criminal Law Article and Title 5, Subtitle 3 of the Public Safety Article, possess in or on an automobile or other vehicle a loaded handgun or shotgun, or a rifle containing any ammunition in the magazine or chamber.
"If your plan is for one year, plant rice.
If your plan is for ten years, plant trees.
If your plan is for one hundred years,
educate children." -- Confucius