Picture the scene.
Tootling along in second gear, end to end, late afternoon on the A1(M). I look across and there's a woman reading to her toddler/child who I could not see. She has some kind of picture book with words, held up in her left hand, and is pointing things out in the book with her right fingers, using her wrist to steer with.
For some reason this made me absolutely furious.
My AIBU is not was she a class A tit, because I cannot imagine anyone disagreeing with that. It's, was I unreasonable to feel so angry I contemplated for a moment stopping the car and berating her.