YOu know what would be funny. If you are in city with a scammer, put a money gram to bank, have them to a bank, then cancel it before they arrive.

Here is another prank you can pull on them...
If you been scammed before and sent money Via Western Union...LOL
Give then the same number that youknow is no longer good any more.! lol
Would love to be a fly on the wall to see the look on thier face! lol
It sounds mean... but I was honest enough to send the money, they was mean enough to lie and take it.
Wouldn't you say ?

Why not just give them a made up number? Why risk involving real money or giving them a real MTCN they could use with a victim?

I am playing to go to Eastern Europe soon. If you want, I will gladly take pictures of who ever picks up the fake money.