[Im A Bald Eagle]

To start with an anecdote without any of my own evidence to back it up, I just want to mention that there is nobody else on the server who lands anywhere close to the frequency of first bullet headshots on me as muddy does. There are a lot of talented players who frequent the server with great aim, eor being a great example, and including others like fanta & caribou. Most of the time, while they will beat me in gun fights, there's usually a quick exchange of a few bullets before I lose (and sometimes even win!). Against muddy, I'd wager it's somewhere between 70% and 90% of the time that I'm killed on the very first shot he takes at me. That's a statistical anomaly. 

While I haven't taken the time to gather my own evidence, eor's video is great evidence and gives me a chance to produce some numbers. What really stands out to me is how ugly many of the missed shots look compared to his typical one-tap. I did a count of every single person muddy attempted to kill in the video: Out of the 70 attempts, muddy killed on the very first bullet 45 times. That's a headshot kill on the very first bullet 64% of the time. 

• What's more interesting is what happens when you split the video in halves. The first "half" of the video is almost entirely close to medium-range encounters on maps like stadium, innomotel, and clue. In that first "half", which includes the first 26 attempted kills, muddy killed on the first shot 21 times, ~81% of the time. 
  
  
• In the second half, on maps like everton, community bowling, and dinkleberg12, he used the rifle much more often, at a greater range. The rifle has a fair amount of bloom, introducing a significant amount of randomness to each shot at range. Because of this, a notable drop-off in accuracy occurs. On those maps, in the second "half" of the video, muddy made 44 kill attempts. Of those, muddy killed on the first shot only 24 times, killing on the first bullet only 55% of the time.
  

I also really want to emphasize eor's mention about the perfect bhopping on the ground level of crummycradle. This is the most conclusive evidence of cheating in the entire video. It seems like he isn't even paying attention to the ground when he goes, focusing more on strafing. If that's not scripting, idk what is.

As a closing suggestion, perhaps there could be some kind of addon that would track combat stats of each player and store it in a database? I think that would be nice to reference in these kinds of situations.