TL;DR invasive proprietary software is a bad thing.
Invasive, proprietary software isn't a good thing, so I limit my exposure to it. But I also prefer not to 3rd-party other people's decision to interact with it. You should know what you're getting into when you install something like Vanguard. You should know what you're getting into when you install any piece of software. It doesn't matter who the software is from.
Yes. That's the problem. Because Vanguard is so invasive and system-intensive, it causes software and hardware failure, or at the very least directly contributes to it. The minutia of "DMA verification" is not we're arguing about. It's that Vanguard actively fucks its users in the ass in the name of "safety."
The only thing I've been arguing about is that it's stupid to complain about this one incident in particular (on page 4) because it has nothing to do with what makes Vanguard shit software. and that people should be allowed to do what they want with their computers.
Cheating in multiplayer games goes beyond personal use. At that point, you're affecting other people.
Revving up LOIC to try to knock someone offline, although it leverages your computer and the network you pay for, is still a bad thing to do, and it's illegal. (I don't think cheating should be made illegal.)
Locally-hosted Vanguard servers would be the best of both worlds, like how FaceIt has (or had) its own AC. Then, you can have the official servers and competitive circuits that rely on Vanguard, people enjoying the game on Linux, and HvH for fun servers like CS has.
You can disable VAC on VAC-enabled game servers you host yourself. I like that.
Failing the breakfast question is failing to understand that there was never any hardware damage. I think you missed the part where all of the controversy of the past few days is predicated on Riot turning hardware specifically designed to cheat on Valorant into "$6,000 paperweights" because they couldn't be used to cheat on Valorant anymore. If you needed to use a DMA for legitimate reasons, you'd disable VT-d anyway.
The precedent is already there, no? Macro-enabled controllers for fighting games, lag switches, even something like SOCD on certain keyboards, etc.
There already exists hardware designed specifically to cheat at video games that are targeted, mitigated, or result in bans.