After reading a bit about Bell's theorem and various hidden variable theories, I thought a little about the detection loophole, and how it gets around Bell's theorem while still allowing a pretty much 'local' Universe. The main argument against this, as I understand it (correct me if I'm wrong) is that it requires some sort of conspiracy and is unfalsifiable. It occurred to me that it should be possible to 'test' this, in a way, by constructing a simple toy Universe that is totally deterministic yet non-conspiratory but still complies with any Bell test experiment (Stern-Gerlach, for example, or photon polarization). If it turns out that such a Universe is impossible to construct, then locality would be unquestionably refuted. If it is not impossible, then it still remains open as a possible explanation of reality. Has anyone ever attempted the construction of a model of such a toy Universe?