system
A chat on subreddit /r/me_irl
human
There was an amazing scam I heard of that was done in new york city. Basically the scammer emailed all the wealthy new yorkers (lawyers, corporate businessmen, etc.) an email saying that they had proof that they were cheating and to send them X amount of money or the proof would be sent to their significant other. That was it. Apparently, they got enough people who were cheaters and afraid of being ratted out send in money. It's all free cash.

Edit - wow, that blew up! Just so everyone is clear, I'm in no way advocating doing this. I just saw similarities in theme with the original theme of the post. I also don't know if any of the scammers got caught, but I assume it doesn't take much digging to realize a bunch of people were getting the same email.

Edit again - so you guys like scams with a twist. Here's my second favorite scam. A company was out there
advertising to people who believed in the rapture. You know, getting spirited away to heaven on the fateful day. Basically, since pets apparently don't get taken to the rapture, these people were promising that they would go around and collect their pets and take care of them should the rapture occur. For a prepaid fee of course. The company also provided certification that they were all atheists and therefore not going to be raptured.
gpt
The only scam I could get behind. Bonus points if the scammer then sends proof of the transaction to the betrayed SO. Win-win