"Exploting" and Wallhacking are the same damn thing. Honestly, if you are going to exploit with any method it might as well be called cheating. That being said, I've been playing TF2 since the night it was released with the Orange Box back in 2007, and I've been playing source games since the late 90's beginning with the all-time classic, Half Life. I can tell you right now, it is easier than you think to make a "wallhack" for source games, especially when the server does not force players connecting to use the same/default files provided with team fortress 2. As of right now, I can change all of the textures to a wireframe texture in my tf2 directory, and play on the server with what would be considered a genuine wallhack.
I have to be honest, when I first played with .wew I could see he was playing better than any platinum sniper I've ever seen. I wanted to mention something then, but figured I would instantly be shut down considering he has made it to adminship and would be fairly "trustworthy."
Now, about the sounds in the source engine. No matter how well your sound system is, no matter how f***in high-tec your surround sound system is.
It will not tell you if a sniper is on the second floor, or bottom floor. Especially in the map the video was taken with. I've got quite the ear, and have headshot cloaked spies while they are invisible and walking around. You can only tell how far an enemy is away from you based on sound. And beyond a certain distance, you can tell their direction. But you cannot tell their yaw positioning in a leveled map like this. It would take a much greater height difference where Player A is literally at a 75+degree angle in comparison to Player B
at least 50 units below / above.
One more thing, and this has to do with player behavior. Over the years playing, I've noticed there are a few different types of hackers.
Competitive Hackers, No-Life Hackers (The ones you see joining random servers trying to get a rouse out of people), and Vengeance (They get shit on by their opponent and want to get back at them...)
What sets these types of cheaters apart is their willingness to get caught. Competitive Hackers will train themselves to do things the same way every time they spawn in. Granted you cannot do something exactly the same way, however, you can create a scary close similarity through habit. Compared to "No-Life Hackers" and the out for vengeance hackers, these guys are insanely good at hiding it, because they've built their repetitive habits to hide the fact that they hack. What also sets these types of hackers apart is their networking, or who they friend, and how many other people they will cheat with. I can say with 90% certainty that Competitive Hackers will always have at least on person on their friends list that uses the same cheat. Why would you cheat with multiple people? Wouldn't that increase your chances of getting caught? Its actually quite the opposite. You can literally improve your ability to hide your cheats when you have other people practicing the same skill and sharing what they know with you and if one person gets banned, the others can get away and learn based on that mistake.
*Heads up, this next section is rather blocky :/*
I want to mention that wew. was connected with three other people I found to be very suspicious, and ultimately wound up finding out my suspicions were correct.
I'm sure some of you had seen "Lucy", "Twisty<<+>>", and perhaps "Kev." All three were very "good." In-fact, so good, they were just like wew. They were out performing platinum snipers.
I did some digging 2 months ago when I saw Twisty teleport up into one of the Orange towers and snapshot a player after spinning 180 degrees around instantly. (You know how the teleports some times face you looking the wrong way?) It could have been "teleport" lag, but I honestly don't think so. Twisty left after I saw it only 5-10 minutes later after I presume they realized I was in spectate.
2 months ago Twisty did not have a "
UHC Caution" status.
"Lucy": STEAM_0:1:68431250
"Twisty<<+>>": STEAM_0:0:24870827
If I recall correctly, Lucy's steam profile was always set to be private, but twisty's only recently set their profile to private.
Why would anyone set their profile to private? Especially when they intend to compete in a UHC Tournament.
I'm no expert, but my experience with games is backed by countless hours of play as well as observing countless cheaters do their thing.
Edit: Forgot to mention my claim that although POV can be used to see around corners, i've never seen it used this well. NEVER. If anything, its just another line of defense a wall hacker can use to protect their mischievous game play, and it cannot explain why Wew. was able to make that shot at 11:22 in the video.