As an agoraphobe with a low startle threshold and an intolerance for stress, I'm mostly housebound and avoid confrontations. But I imagine confrontations. I imagine what I might say in certain situations.

"Good one! Insult four other people and you will have reached your antisocial quota for the day."

"Ah sir, feel taller now that you've stepped on someone else?"

"True, my obesity is obvious. Pedophilia is not so obvious."

"You pretend to know the whys and wherefores of my manifest shame. We'd like to know the whys and wherefores of your hidden shame."

Etc.