I remember once going in to a barber's shop in Beirut for a haircut during the war years.
I'd already sat in the chair when a heavily-bearded and heavy-set guy sticks his head in the door and asks the barber to cut his hair. Barber says something like "the gentleman is sitting" and looks at me. I said no. So the guy looks at me and leaves.
Then the barber says you know who that was.
No.
He's the security chief for militia leader X.
Wow.

No, I'm no Rambo but I'm sure there's a moral somewhere in that story. And it's completely true.