Again, I think this is where we differ - you're thinking in terms of stocks and shareholders, but there are no shareholders here. There are no shares that represent ownership of anything, and the most important distinction here is that when the fork was created, there was no transfer of ownership, which is the key concept in your argument.

Also, if I change my level of abstraction to think about the problem as you say, it would appear that the attacker was trying to injure the project, opposite to your Casey example, where she was the victim. Those that had 'skin in the game' did what they had to do, to protect themselves from the attacker. I don't think the attacker was naive, they would have known that such a move would inflict a loss of value for the project.

I also think that the hardfork was the best outcome for both parties: Classic represents the value of Ethereum should it have chosen to keep on going with the attacker, and Ethereum Fork is the value representing the attacker absent. Everybody wins, the thief would be pretty happy with their loot regardless (if it's legally theirs, maybe it's not). In your Casey example, she was left with nothing, so it's another important distinction to make.

Btw, thanks for replying and for the debate. It's been a pleasure.