This really happened:-
Guy walks into a dealer friend of mine & buys a £5k outboard & pays on his credit card, says he'll be back in a couple of days to collect. A couple of days later he rings my mate & says he can't get, but his brother is calling to collect the engine & he'll be there in half an hour, sure enough, half hour later bloke turns up says "I've come to collect an engine" loads it up & drives off (bear with me, you can see where this is going) Ten minutes later, another bloke turns up & says that he's come to collect engine for his brother. Credit card company claws back the 5 grand & my mate is an engine down, barstewards. Police not interested.
Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4: See rule#5