I heard that a particular donut chain that has a questionable hashgocha used to serve a parve vegetarian bacon until once the State kashrus inspectors found that the non Jewish workers had erroniously accepted a delivery of real bacon. I understand that they no longer serve that product, but things are warmed up in microwaves and with no Jew present in the establishment. What would keep the workers from warming up their meals in the microwave.
Certainly you don’t think that the d. donuts employees only eat donuts and coffee day in and day out.
Do you need donuts so badly that you’ll compromise on kashrus?