Just because Valve probably didn't update their EULA doesn't mean they didn't update their VAC's capabilities.
I see, so now you're speculating that Valve is doing these things despite the fact that they would be criminally and civilly liable under a wealth of unauthorized access laws? Do you have any evidence to support this? Do you really believe Valve's legal team is that dumb?
Again you are suggesting that every multiplayer game has mandatory intrusive anti-cheat software. This is not the case. Some games don't have any, and some have optional AC (most according to another poster).
Why is optional AC not an agreeable solution? You get your intrusive scans, and fewer cheaters; and we get our privacy and more cheaters.