I've reported this in other threads, but I like to let them get into their script and play along so they think they have a live one. Then after a bit I ask "Is your mother proud of you and your job" (response) "You are trying to scam me, lets agree that, so, are your family proud of you for trying to con money out of strangers in other countries?" Without fail they lose the plot, I even had one call me back five minutes later and ask what right I had to judge him.... So I told him again.