Q. “Can I ask you a question?”

A. “You just did. Good day.”

A2. “No”

A3. No answer, just keep walking

I always choose A3 although A and A1 are what I say to myself after.

I don’t engage at all anymore. Once a guy asked if he could ask me a question and I said, “sorry man, can’t help you” and he followed me while berating me for assuming he needed help. I turned around and said, “ok, so what do you need?” And he said, “you know what?! Fuck you man!” and stormed off.