You're still not answering the scenario in post #18. I'll make it even easier with additional information. The plane is going to an outstation where you know it and the crew stay the night. Routing and legality issues are not a factor. OBTW, it's the last flight of the evening. Zone says go and you're really going to leave people behind?

I fully understand at times we don't have all the information. Pretty sad when the situation is so glaringly obvious, zone tells you to go, and you hide behind "we get paid to fly".