Essentially, all this crying comes off as people complaining about something they haven't taken the trouble to understand.
1.) Blizzard warned everyone back in September [http://www.escapistmagazine.com/news/view/103464-Blizzard-Warms-Up-Banhammer-for-StarCraft-II-Cheaters] that it would be banning anyone who was "cheating or using hacks or modifications in any form."
2.) This isn't even a permanent ban. It's a two-week suspension.
But even if 1.) and 2.) WEREN'T true... frankly, it'd still be pretty justified.
The way SC2 is set up, the major incentive reward (other than victory for victory's sake) is the different portraits you can unlock for your account. So that when someone sees you, they go "ooh, he's won 500 games as Zerg" or "ooh, he's done all the super-hard achievements on the super-hardest difficulty." If Blizzard has any vested interest in preserving the integrity of its system, as Microsoft does with its gamerscore, for instance - and it DOES - then it needs to take action on people who cheat it. Otherwise the people who earn said rewards fairly end up feeling like, "Well why did I try to do this when I could have just cheated?"
As I understand the matter, the only difference between the cheats that the people who got suspended were using and Blizzard's already-implemented in-game cheats is that the Blizzard cheats disable achievements and the third-party hack does not. Ergo, the only reason to use the third-party hack is... to get achievements. You wouldn't do it if that wasn't your entire goal in the first place.
This isn't about, "Oh, what if you just want to hack the game to make your units move really fast or play around with things?" You can do that in the offline Guest mode, which isn't attached to your profile (which means you can't get achievements). The fact that they were doing this logged in, with a trainer that specifically let you cheat to get achievements, shows that they went into this with a purpose.
They were trying to game the system, and Blizzard dropped the hammer - as it had explicitly warned people it would. This is completely justified.
You can cheat/hack the offline game as much as you want. They can't ever take your offline mode away from you. But the moment you start intentionally trying to mess with the entire multiplayer system of incentives and rewards, you get what's coming to you.
Edit: Oh, and Logan is totally right that the CheatHappens site has a vested financial interest in making this story seem like the Big Bad Wolf vs. the Valiant Underdog. They're selling hacks to the game, and they can't do that if Blizzard is banning people for it. Remember what happened the last time somebody did that [http://www.escapistmagazine.com/news/view/86562-Blizzard-Clobbers-Glider-Bot-Maker-In-Court]?