A street thug and a paid killer are professionals - beasts of prey, if you will, who have dissociated themselves from the rest of humanity and can now see human beings in the same way that trout fishermen see trout.
I don't think anyone ever gets over the surprise of how differently one audience's reaction is from another.
So I rang up British Telecom, I said 'I want to report a nuisance caller', he said 'Not you again'.