I just experienced the most eloquent telephone scammer ever.
He was one of those Indian chaps who've been calling all over Great Britain and the United States, identifying themselves as either Microsoft employees or Cyber Security agents and telling their marks that their computer is spreading (or in this case, mine was receiving) all sorts of terrible viruses.
They then provide computer instructions to the "callee" so that he, the technician, can fix the problem--which of course only provides the scammers with access to all the mark's computer content.
I played along, OKing his every instruction, and when he proudly asked what my screen was showing at one final point, I said, "It says this is a fraud being run by criminal clowns out of India."
His response was pitch perfect: You Americans are motherfuckers.
That rather concluded our little conversation, but it was worth it.