You would think that after six years of living with food allergies, we've got it all down pat. But one can be a little too complacent and too trusting. We ended up spending Thanksgiving in the ER because we assumed, and wrongfully so, that after this long our extended families understood exactly what they were dealing with. Food allergies can be extremely complex and poorly understood, and so there's nothing beneficial about playing blame games. Even when everyone is being super …