Many years ago young Mr G who had discovered that his best mate was knobbing his girlfriend and suffering associated sense of humour failure.
'Ring ring' "What the f88k do you want?"
"Do you know who I am?"
"Nope"
"Your attitude will bring repercussions young man"
"Is repercussions some sort of French food? Anyway, f88k off"
(The phone system was on tannoy).
Many questions asked and the guilty never dubbed in.