How does ethics have anything to do with normal business behavior? Business behavior is aimed at maximizing profits. Ethics never get into that equation.
Tarantino can take the Cinerama Dome up on the clause in the contract that states what penalties are in effect in case of breach of contract, but that's about it. Cinerama obviously decided that breaching contract and taking the penalty was a better business-decision than upholding their contract.
I realize that since I was last here new info came out painting Quentin as a liar, but to revisit this conversation started when we were operating under the earlier assumptions.
That would of been a very gross violation of business ethics on the part of Disney. Also it is worth noting that once again you were purposefully leaving out the context in which that decision was made. Which would of been one made under threat and extortion in the Oxford dictionary sense.
Again, I know things have changed but you are still presumably going to bat for a company that would be willing to pull such tactics.
Just because something is legal under the law does not make it ethical or right. Chalking any and all actions that are legal under the law as just "normal" behavior is to take a sociopathic approach to decision making and actions. Your argument is basically "if I can get away with it, it is morally and ethically just." That is a horrendous precedent to operate under.