Anyone that has spent any amount of time playing on Blizzard's Battle.net in the past knows just how rampant hacks and cheats can get at times. But Blizzard is cracking down on those that choose to break the rules in StarCraft II. In a stern warning, the developer issued a warning to those using hacks or cheats on the StarCraft II website.
Blizzard Entertainment has always taken cheating in any form in Blizzard games very seriously, and that's no different for StarCraft II. If a StarCraft II player is found to be cheating or using hacks or modifications in any form, then as outlined in our end user license agreement, that player can be permanently banned from the game. This means that the player will be permanently unable to log in to Battle.net to play StarCraft II with his or her account.
Playing StarCraft II legitimately means playing with an unaltered game client. Doing otherwise violates our policies for Battle.net, and it goes against the spirit of fair play that all of our games are based on. We strongly recommend that you avoid using any hacks, cheats, or exploits. Suspensions and bans of players that have used or start using cheats and hacks will begin in the near future.
As you might expect, this also brought about forum discussions about multiple monitor use, gaming keyboards and mice. There are even some people blaming Blizzard for the actual cheating. But at that point it's simply splitting hairs. It's pretty clear what a hack and a cheat is, but you'll always find a few trying to justify it by other means. You use it and get banned you have no one to blame but yourself.