You will run into problems though (and Ethereum has had way more than a fair share of these) if people fuck up their code so that others can exploit the code with behavior that was not supposed to happen.

In the real world, you and the counterparty would meet with your lawyers at a courthouse and have a good chance of winning if your claim is solid. In the cryptocoin world, there are no such entities by design, and every error you make cannot ever be recovered.