Not only the obvious “AITA for leaving my mafia boss husband after he murdered my family” deleted AmITheAngel crossposted posts that everybody knows it’s fake, but also, some viral post that everybody believed to be true and they never called it out or realized it too late after some ridiculous update.
First thing that comes to mind would be the saga of Jenny and Carly. I got zero work done for days it was so entertaining but it was clearly fake from the start.