Here's a big oops -- a company named M&A Technology accidentally shipped out a unit of their Companion Touch PC that contained some malware on it, including a password stealer that targeted World of Warcraft. It was an accident -- apparently someone at the factory decided to upgrade the computer's drivers and software before shipping it out, but they used a USB stick that had been infected with the bad apps, and thus in the process infected the brand new computer. Fortunately, the person who received the computer apparently scanned and caught the bad code before any damage was done -- I guess if you buy a computer from a brand you've never heard of, it's worth giving it an antivirus and malware scan at least once before you use it.
And/or you can just use an authenticator -- even if someone nabs your password, the Blizzard Authenticator makes sure that they can't log in without a current code. So there's not too much to worry about here -- while computers do occasionally get shipped with software that could jeopardize your security, as long as you're vigilant about what's on your hard drive, and take caution before using apps and hardware that you've never used before, you generally won't have any problems.
[via WoW LJ]