A title is required, and is probably a DMCA violation
"According to this ruling, if I type "there is no cow level" on StarCraft, I'm BREAKING TEH LAW.
If I use one of those "Diablo character editors" to give my sorceress an instant lvl 32, I'M BREAKING TEH LAW.
Hell, I'm probably violating the DMCA if I type IDSPISPOPD while playing DOOM. "Oh noes! He's walking through walls!""
Actually, no, that isn't the case. The things you mention--the Diablo character editor, the Doom cheat code, and so on--are not violating an anti-circumvention measure; indeed, cheat codes built into a game can't possibly do this by definition, as they are PART fo the game.
Essentially, this ruling is not "cheating = breaking teh law," hysterics aside. It's "cheating by circumventing an anti-cheating mechanism that protects a game's database" is breaking teh law. You might not agree with that principle, but it's quite a lot different from what you're talking about.
In a subscription service where you're paying for access to someone else's resources rather than hacking a bit of software on your won computer, I think it's reasonable to bring matters of law into play. To move away from WoW for a moment, if you were to violate the rules of your country club, you could be arrested for trespassing on the golf course. That's not saying that cheating = breaking the law; it's saying that the owner fo the country club enjoys legal protection from unauthorized use.
Same is true of a gym, a public swimming pool, and so on. Even if you pay fees, you can't do whatever you want, and if you insist on violating the terms under which your membership applies, at some point the law will get involved.
Blizzard owns the servers, the databases, and the routers. Buying a boxed copy of World of Warcraft doesn't entitle a person to do whatever they want on those servers or with those databases. If someone continues to abuse those resources, eventually the law will get involved.