Years ago I used to stay up late at night and go to 419eaters.com. If you don't know, the 419 comes from a law that they passed in Nigeria to try to stop scamming, both on the internet and in general trading, basically that what you are selling must be pukka. If you think a Nigerian is trying to con you, you ask "You trying to 419 me?" I know, I worked in Nigeria for 6 months.
I've just tried 419eaters and it seems to have gone away which is a shame. Basically they were experts at conning the scammers. Its hard to believe but scammers are susceptible to their own tricks. These guys would get scammers to travel around the world, at their own expense of course chasing the promise of money. In one case they got the scammer to go to Singapore where they were promised a suit case full of dollars, in payment of the 'management expenses' that the scammer had incurred. They posted all the phone conversations with the scammers on 429eaters. An anti-scammer chap who was American with the money would meet the scammer at Singapore docks. The American was obviously something of a skilled audio enthusiast, presumably in his bedroom, arranged to meet the scammer at the docks to meet the 4pm ferry. They had of course checked there was a 4pm ferry. In order to identify the scammer when the ferry arrived, the scammer had to carry a big fish on his head, and wear a placard stating in big letters "Iama Twit" and take a selfie and send it to the American. So they posted a picture of this guy wearing the placard and the fish. The voice recording, after all the introductions and instructions, went to the American being on the ferry with suitable ferry boat fog horn noises, the passengers chattering away, engine clanking and so on. Suddenly there was a huge explosion and the American shouted "OMG, the engine has blown up! We are sinking!". Much gugrling of water and then quiet. Next day the American phoned the scammer to say he had been rescued and taken to a nearby hospital and unfortunately had lost the suitcase in the sinking. The scammer was getting distraught because by now, what with all the expenses of travelling to Singapore and the hotel bill he couldn't pay, he had run out of money. He was crying into the phone that he hadn't eaten for three days. An accomplice of the antiscammer was in Singapore and knew of the temporary visitor visa rules allowing 30 days stay, which was now up. The scammer had been by delayed in Singapore and his visa had expired. He couldn't afford the air fare to get back home. He couldn't pay the hotel bill. The accomplice knew where the scammer was staying and reported him to the Police. The penalty for overstaying your visa, and his inability to pay the hotel put him straight into Singapore jail. But you have to be very skilled to play that game.