After a number of Rock, Paper, Shotgun readers and official Diablo 3 forum posters alleged that they had been banned from Diablo 3 after playing the game on Linux, Blizzard responded both to the forum and the publication maintaining that users were only being banned for cheating, and not for using the operating system.
Blizzard had this to say about the allegations,
“Playing the game on Linux (although not officially supported) and/or using Wine will not result in being banned, but cheating will. We’ve extensively tested various scenarios related to this situation, including replicating system setups for those who have posted claiming they were banned unfairly, and have not found any situations where players were banned solely for using Linux or Wine.”
Via: Rock, Paper, Shotgun