Blizzard has once again confirmed that playing Diablo III on Linux will not get any gamers banned but cheating will. Recently many gamers claimed that Blizzard banned them from Diablo III just because they were playing the game on LINUX.
In response to this thread, Bashiok said, "We’ve extensively tested for false positive situations, including replicating system setups for those who have posted claiming they were banned unfairly. We’ve not found any situations that could produce a false positive, have found that the circumstances for which they were banned were clear and accurate, and we are extremely confident in our findings.
He further added, "Playing the game on Linux, although not officially supported, will not get you banned – cheating will"
So in simple terms Blizzard clearly stated that you won’t be banned for playing Diablo III on Linux (although it is not officially supported) but cheating by any means will get you banned.