Assuming they managed to make some kind of bug that was viable outside of the lab, we genetically engineer a spider to eat the fly. Obviously, this kind of thin

Assuming they managed to make some kind of bug that was viable outside of the lab, we genetically engineer a spider to eat the fly. Obviously, this kind of thing has the potential to get out of hand as the technology improves and becomes more accessible. Maybe this is the Great Filter, or maybe the filter is not having a full enough understanding of things to solve problems before it inevitably becomes garage-level science.