Very very stupid stupid people!!

This is something that infuriates me! I have a friend who always takes her dogs with her everywhere and leaves them in the car. I have been preaching to her for years now and I just now feel like I am getting through to her. I don't know why she was so stubburn about it. I would actually yell at her and she would blush and seem so embarrassed and say.."I know, I know", but she kept on doing it .