When there's a million dollars at stake, it's obvious the crims are going to come out - even it's for a fast food game.
Well, it seems obvious in hindsight. I hadn't given much thought at all that McDonalds' Monopoly game would be ripe for criminal plunder, but of course it is.
In the US back in the 1990s the Home of the Clown was giving away instant prizes of $1 million - as if someone wasn't going to work out a way to scam that.
An agent at the FBI had a tip-off about it but even he had trouble at first convincing his superiors that investigating a contest run by a hamburger chain was worth the bureau's time.
But that agent, the rather un-FBI-like Doug Matthews, managed to show that a number of the winners of the really big prizes were all related.
And when you're talking multi-million dollar fraud, then that's definitely in the FBI's wheelhouse.
The whole story is told in a fascinating six-part documentary series McMillions (the series spells with a dollar sign instead of an S at the end, but that's just dumb).
It's a great story, but one that was apparently almost unheard of; the documentary makers couldn't find much reporting on it and had to go direct to the FBI to see if they'd talk.
And, thankfully, they would.
The documentary makers have managed to interview a number of the major players, including those from law enforcement, relatives of the men behind the scam and even those who were given the winning pieces to cash in.
It's this cast of characters that really bring the show to life. Top of the list is that FBI agent Matthews, who is extremely entertaining; he was bored to death by the healthcare fraud he was investigating and figured the Monopoly case has "got to be more fun than this shit that I'm looking at".
There's also the oddball Robin Columbo, the mafia wife who claims to have realised too late what she was in for when she married her husband and Monopoly man Jerry.
There are plans to make a movie about the fraud with Matt Damon and his mate Ben Affleck but after seeing some of the real-life people involved, it's hard to see how Hollywood can top this.