[sneak]

Easy solution. Torrent the iso, return the lost property (the disc) to its owner.

No moral or ethical issue whatsoever. Nobody's rights violated. Everybody wins.

[jhasse]

The iso and the disc contain a finger print -> they know it must be you -> you lose

[hd4]

They would still have to prove you a) leaked it, b) didn't prevent someone taking the CD and creating a backup without your permission

[jhasse]

While that is true, I still count "getting into legal trouble" as a lose, as Blizzard already has well-payed lawyers. Even if you win in the end, you won't get the time and a compensation for the stress back.