No. All soldiers of Heaven are meant to obey the will of God. [ Or whoever could make the strongest claim to being His proxy. Castiel can't believe the thought never occurred to him before, but the thought of the archangels lying about their Father's plan and passing off their own words as his had just been so unthinkable. It's still very unthinkable. He can only consider it at all because the alternative is that much worse. ]

Up until very recently my duties only rarely put me in contact with humans, yes. I'm told it's a little obvious.