A community manager from Blizzard's response:
http://us.battle.net/d3/en/forum/topic/5978861022?page=21#40...
"Playing the game on Linux, although not officially supported, will not get you banned – cheating will."
"Playing the game on Linux, although not officially supported, will not get you banned – cheating will."
They claimed that they tried and failed to replicate the failure, but anyone who's done any kind of software development knows this is far from conclusive proof.
A post mortem on the logs of the banned accounts is absolutely necessary. If they're not willing to do that, they should at least refund the accounts.
[1] http://www.linuxlookup.com/2006/nov/22/blizzard_unbans_linux...
Also, other WINE users are posting saying they've had no issues.
The story's being spread around now, so I guess we'll see one way or another because other users with the issue will either show up, or they won't.
;)