@Tehtsuo -

Yes, I would notice if the EULA had changed. Pursuant to my Juris Doctorates degree, and having a background in Computer Engineering and Mathematics, I've read (skimmed to the important parts; they're usually always in the same spot) it a couple of times.

In the past, I've also been involved in writing documents similar to Blizzard's stated EULA for a couple of different independent software vendors. From a business perspective, I would argue that Blizzard is simply trying to pursue this lawsuit to eliminate a corproation which thrives off of undermining their game. The integrity of Blizzard's World of Warcraft is an intangible thing that Blizzard truly cares about (hence why Blizzard bans and suspends people for simply cussing in their public channels). I would argue that a program like Glider ends up costing Blizzard money in the long run, as Blizzard employs people to keep track of accounts in question. Blizzard has a department for handling account closures as well as suspensions. As you are well aware, people don't work for free, and this lawsuit marks the beginning of a new era for gaming corporations. This lawsuit gives Blizzard the right to collect on damages to their game (again, all Blizzard has to do is show salaries being paid to N-employees, along with their specific job function, as a result of the Glider program). Programs like Keyclone, on the other hand, don't reap their profits solely off of Blizzard's game; as Keyclone can be used for a myriad of other purposes. While you may make the argument that Glider can be used for other purposes, its primary function is for the World of Warcraft game.