I *did* say it was a crazy idea. It's just my weird sense of humor. But seriously, my guess is that, what ever can be crafted can be un-crafted for lack of a better way of explaining myself. As we level up and can mine for better gems, maybe we can …
Here's a crazy thought. Maybe guild cities can utilyze a 'recycler' that would melt down used equipment and then turn it into a by-product that could only be launched from a seige engine.