It's not as popular as FarmVille or Mafia Wars or Draw Something, which is probably why hackers thought it would be an easy target. And they were right. Zynga has admitted that a group of users exploited vulnerabilities in its game YoVille, but they didn't have access to any sensitive information. What they were able to do, though, is erase the inventory of players, some of whom no doubt spent a fair sum of real money to acquire that inventory. However, this isn't an issue of user privacy.