You are all missing a crucial point here. There was a contract involved. Contracts are not flexible. If you screw up one of the points, its on. Interplay screwed up one of the points. They sold a trilogy of a game which is no longer in their hands. Sure, they created it but they don't run it anymore, it's Bethesda's now. If you sell a car, you don't get to drive the car. Interplay was asked not to sell anything from their old Fallout games without permission from Bethesda, they sold a trilogy without consulting Bethesda and now they've got to face the consequences. It's that simple. Agree to the contract, follow the contract.
If you want to stop a company from doing something like this again, you slap them on the wrist, that means suing, that means legal costs, that means canceling their agreement. This isn't a handshake between neighbors people, this is a company that willfully ignored the stipulations in their contract and now have to pay the price. Bethesda isn't "whining", they're protecting their new investment from the people who sold it to them.