I had a thought about smart property in a business setting. Suppose I issue bonds for my business to buy new equipment. To ensure my investors that I don't run away with the cash there would need to be a way to mark the the bitcons I receive so that I can only purchase equipment with them from certain manufactures that will sell me products that have been tied to the bonds somehow. Furthermore, there would need to be an added incentive for me to ship back the bricked equipment if I break my contract (say I get back triple the shipping cost).