One of the commonest scams is known as Advance Fee fraud. These are the emails you sometimes get promising that if you send someone money (usually to pay for some kind of administrative work) you will receive millions in return. For some reason, most of these scams originate in Nigeria where they are referred to as 419 scams, from the law that these scammers are prosecuted under. Over time, a kind of online sport has grown whereby people bait these scammers by entering into correspondence with them acting as if they were going to send them money, procrastinating and playing them like fish simply to waste their time and annoy them. These wind ups can go on for months, often involving dozens of emails and the results can be very funny. The most skilful of these “Scambaiters” as they are known have gone on to create YouTube channels where they enter into telephone conversations, with bizarre and often hysterical results. The best Scambait channel of all in my opinion in Scambait Central, whose creator calls himself Mr Pricky Queerhouse in correspondence with scammers, and works with others to drive these scammers mad. He never reveals he is winding them up as they would learn how to make themselves more believable.
The following link is to one of his calls. WARNING: Do NOT watch if easily offended