At first I thought that whoever had their account hacked in WoW were computer illiterate, falling into traps such as clicking an executable attached to e-mail called "hot_girl.exe.
But after seeing so many people losing their accounts, even employees of Blizzard I began to imagine that maybe the hackers are really a step ahead.
I don't like the idea of needing to use the authenticator, it emphasizes the idea that your computer is in constant danger and I prefer my entertainment to be free of paranoia.
However, I applaud Blizzard for offering a solution. My nostalgic side remember when gaming was restricted to just put the cartridge into the console but I'm practical enough to see that times have changed and we must change with them.