Okay, let me explain something here, since a lot of people seem to have the wrong impression.
One of the key principles of intellectual properties is the idea for inventors to patent their ideas so they get credit for them, and other, bigger companies can't come along and steal their work, or develop (even through self-discovery) something that someone else had the idea for first. One big thing that is done with patents is people will patent ideas that they do not have the money to develop themselves and then shop around to find businesses who will come up with the money to do so, with the patent holder taking a substantial share of the profits. Things can be patented ahead of the tech curve, based on predictions of upcoming technologies and ways it could be used, again this is part of invention, and the idea being that if someone develops a tech can do something, they can then sell this idea for a way to use it.
I admit that I do not like where this is going either in this case, being a fan of WoW and online gaming. However, put yourselves in the shoes of an inventor with someone else coming along and stealing your idea, and then getting away with it because they are a big company.
An issue with patent violations of this sort also have to do with the specifics of how something is done. Being able to prove that something like "WoW" or "Call Of Duty" violated a long standing patent is not an easy thing to do because it can involve getting to the bottom of how something works, or what principle it operates on. Other copyright laws and liscencing agreements can make it difficult to get information about products and trade secrets behind them without breaking laws.
There is a substantial differance between putting a patent on something like "air" or something that previously existed, and a technological development or an idea.
Understand also that "online gaming" and these kinds of tournament systems are not some kind of long term part of human culture or metaconsciousness. The very idea of online gaming, virtual reality, cyberspace, and even The Internet is very, very recent. This kind of stuff was the domain of science fiction not too long ago. This is something that I think a lot of kids don't really "get" in growing up with this stuff.
Taking a general science fiction concept and then saying "here is a way we could make this really work" is perfectly valid, and if someone else takes that idea without giving you your cut for being there first, well that's a problem.
Now, I have no idea how this will play out in court, or the truth of the matter, since there just isn't that much information. However with all the griping I do about China's "robber economy" and patent violations and the like I can hardly claim that makers of online games I play should be immune to the same basic logic just because they are American and I like their product.
There is a danger here that if this is 100% legitimate that it could put Blizzard-Activision almost entirely out of business and wreck a lot of hugely profitable intellectual properties. That will blow chips for us, the gamers, but it won't change the fact that the guys getting hit were effectively thieves, or at least sloppy enough not to do their homework.
It could also be patent trolling, again there is no way to tell at this stage and with the information presented.
Honestly I've had some concerns even domestically that it's become too easy for the big businesses to do whatever they want, and effectively steam roll the little guys and the innovators whenever it becomes conveinent. If they really did come up with this tech back in 2002 and it was either stolen, or developed without the research, I am sort of cheering for them. I mean one of the thing that crushes innovation is the exploitation of the innovators.