[Revenant100]

With pure off you can change textures to wallhack which is almost undetectable in a game like tf2 where textures are modded often.

But the express purpose of the May 18th update is to prevent $ignorez from creating such texture-based wall hacks on in-game models. In fact, $ignorez was the sole cause of the texture wall hack that you describe. This very simple change really has dealt a massive blow to non-VAC detectable cheating (And it was pretty dumb for Valve to leave it exploitable for so long, but I digress). In comparison, most remaining cheats created through modding are dumb things that are far less effective or highly situational at best.

It was switched because of issues with material hackers and people using large models that show through walls.

That's quite a surprise to me as, in the literally years I've been playing on the Arena server, I've never once heard a single mention of cheating. Sure, I can imagine that accusations happened more than once, but considering how you're under virtually constant surveillance from spectating players due to the nature of the game mode, it would be pretty difficult to actually get away with legitimate cheating.

However, if it the issue really did warrant a change to the server's sv_pure setting, I'm not going to doubt your word. I appreciate the response and offering a suggestion to the whitelist, but considering that I would quite like to have my custom player skins working again, I can't imagine that you'd grant it since it's so close to where the cheating occurs. Of course, with $ignorez no longer working on models, I can't really imagine what effective methods of cheating could actually be employed now in this regard.