People are simply rude and inconsiderate.
I have an elderly parent living with me and I am her sole caregiver. I take her on a Mother's Day trip every year so she gets to travel somewhere that she'd like to go. When returning home this year, a guy began cursing me at a Flying J in NC because I was taking too long (he ignored the other rig that was there before I arrived).
Getting Mama out of the truck, inside and in and out of the ladies room and back out and into the truck is a long process and exhausting for her. It upset her greatly when this happened, especially because he came up to the truck when she was sitting there and was banging on the window.
People have no respect for others, especially the elderly and disabled. On the upside, this spurred me to move on with my Class A purchase so that she doesn't have to get in and out when we're traveling.