AdumbroDeus said:
Reductio Ad Absurdium is not a fallacy.
Nobody said anything about nor against "reduction to the absurd", or at least, I'm not aware of anything like that being said.
For the precedent thing, yes, the connection might be somewhat contrived, but it's certainly not "nothing", and a smart lawyer could probably use it at least as a slight leverage, if nothing else.
I am not a lawyer, let alone an USofA lawyer, and obviously, my horribly simplified views of the US justice system comes from inaccurate movies and a few things picked up over the internet, so I won't claim I know EXACTLY what I am saying.
Still, one can try to concoct even a strained line of argumentation which you never know who could latch onto and do what with it.
The first issue would be game ownership, or better said, defining WHAT constitutes a game, and defining exactly what a Steam-like service really is.
For starters, if you get banned from Steam, you lose access to a lot of games. Since I doubt anybody sued Steam for stealing their paid-for games, one can only conclude that either they were afraid of the EULA too much, or they didn't really consider THOSE particular games "theirs".
A MMO can usually get away with banning you because they claim THEY still own everything "you have" in-game, including the characters, so all they "really" do is cut your access to a service, similar to canceling any other subscription.
But can Steam claim the same thing ?
So the question is, what is Steam exactly ? Practically, Steam is more of a game rental service rather than a game retailer, or at least closer to the former rather than the latter, or else you could at least sue to never have your Steam account banned, just denied purchase of additional games and maybe denied access to multiplayer mode.
To rule that Steam must allow you to sell forward access to parts of their service would be extremely similar to arguing that games that happen mostly online should also allow their users to sell forward access to their services, namely ingame goods, currency or even characters.
Or something to that extent.
To the limits of my extremely reduced knowledge, anyway.