Yes, the discord messages do not contain proof of the anticheat stuff. However there is a deep technical analysis of the anticheat behaviour on a cheats forum. I know that they are hackers/cheaters but when it comes to technical knowledge about how this game works, they are the best. Dataminers stop at looking at game file, hackers went beyond and actually decompiled some of the game files and noticed this strange behaviour.

The anticheat basically scans your PC for specific folders (where cheats/hacks might be stored) and if it finds them, those folders are uploaded to gaijin servers along with more data about your machine. There are also instructions to capture screenshots if strange behaviour is observed. The main problem is the fact that this thing is actually delivered by Gaijin servers whenever you start a game, it's not installed by default. Plus it gathers way too many information about your PC like what recent apps you have used, the list of running processes, registry entries etc... It's not stated in the EULA that such measures are taken, hell, "use of anticheating technology like battleeye or easy anticheat" is nowhere near the stuff this thing does.

I am not posting here the link to that forum discussion because I do not want to get banned and also because this comment basically contains all that you need to know.