Do you mean ESL and their Aequitas / Wire anticheat? I don't think you can force client-side screenshots with just a server-side TF2 plugin.

He's talking about this. Afaik it only took a screen of your TF2 & whatever a cheating client would show in the game if one was injected, not anything else on your PC. It caught out a lot of people playing on any servers running the plugin using wallhack etc. like https://imgur.com/B9UjE or https://imgur.com/CrJOb.
Valve patched out the method at some point according to AnAkkk, likely due to the privacy concerns.

Thats it! I think this would be a huge deal now if this happened it was crazy.

Was the ESL anti cheat similar to the ESEA client? I just remember there being a controversy where it was found that it was mining bitcoins on users PCs?

ETF2L never enforced Anakin's plugin I don't think? They were actually at odds with Anakin and had a huge history of disagreement since his time with ESL etc, but some servers chose to run it and ETF2L had to make decisions whether they would use the data the plugin obtained (they did).

For more history:
https://web.archive.org/web/20161030213455/http://www.vanillatf2.org/2012/09/are-matnun-and-tarkus-dirty-cheaters-you-decide/
https://www.reddit.com/r/tf2/comments/101o4l/does_anyone_have_more_info_about_the_guy_who/

You know I was thinking back to possible ways to make this feasible. And I'm thinking about the ways for perhaps financing it. Would be a terrible idea for making Promod a subscription based model?
The moment you involve money the seriousness of any issue related to how it's managed goes up, and that's understandable. But lets just ignore that possibility for now and think about just how realistic is this?
I think it's quite possible if the amount is large enough (1 euro for 1k players = 1k euros. etc..).
for example take serveme premium. obviously not everyone pays server me premium, but they hit their goal of 340 euros a month, that's with the fact that only one person per team really needs to get it, or just not at all. normal servers are still fine. It's just that I think if we start at the amount of 340 euros might have enough people that if each person need to pay just 1 euro we can probably get an amount that can support a small team of devs to take a couple of months to make it, then they can use the money each month to maintain it. And if there is excess maybe it can go to prize pools or something idk.

Just an idea that I thought up real quick, what do you guys think about the feasibility of this?
I think we can start hypotheticals at 1 euro but imagine if it was 5 euros instead would 5 be too much?
P.S: After some more thought, I do feel like this might limit newcomers, so what if freshmeat cups were free, but the actual league wasn't? if you want start playing for real you'll have to pay the fee sorta deal.

A couple of features that come to mind:

• Color-blind accessibility: Change the main color of either team
  
• No Cosmetic Settings: No mod installation. Granularly choose what type of cosmetic items to disable in-game
  
• Expanded Advanced Video settings: more console commands should be settings found in UI. I shouldn't have to download comfig to make my game run smoothly.
  
• Add popular config scripts as bindable actions in settings: C-tap, jump crouch, loadout bind, engineer buildings

A tiny annoyance I'd love for a promod to fix is removing picking up weapons and thus going back to dropped weapons just being ammo instead of also having to drop an ammo box

Pyro removed
Electro added
electro has lighting gun quake 3 but with airblast

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Electro removed
Rubbero added
Rubbero has rubber gun it can pull enemies/pull and steal their weapons and use it for xx seconds and push enemies away

pyro has giga airblast that physically removes the opponent's keyboard from their desk when used (tf2 is now an esport)

They hated Jesus because He told them the truth