grocery cart etiquitte

I was at the grocery store last night and this women who was fully physically able pushed her empty shopping cart into a handicap parking spot and walked away. Why am I writing about this seemingly unworthy event, because it drives me crazy! Why are people so lazy and inconsiderate that they cannot either put the empty grocery cart in the designated spots, which are all over the parking lot, or take the cart back to the front of the store! UGHHHHH!!!! Just wanted to get that one of my brain!