SS gave a very good answer.
IPlayWow, not sure if you've ever played or seen a word passing game. It's a game that involves several people, and their responsibility is to pass the same message down from person to person.
Guess what? The message nearly always get distorted halfway through because people don't remember word-to-word, and when a detail gets forgotten, the best they could do is to fill it up with at their best of ability. That means they could be adding the wrong details in, thus distorting the message. These things seem better remembered when passed down as poems and songs. XD!
You never answered one of my first questions, which is "what do you really know about real history". Yes, history of those days weren't shot in cam so nothing is clear cut. The only comfort we have is that the people who wrote them are SCHOLARS who actually studied them. I'm not so sure about your friends.
And you have to differentiate between the societies of those days compared to now. I mean, you are mixing around with the underworld?
And btw, how do you know for sure if Xun Yu really did that for real? No live streaming videos to prove your case. If you are basing it off on the teleseries, then the argument is as moot as you said Wei Xiaobao's is.