As I read the back and forth comments, I get the sad feeling that this here is what makes them unreceptive to the unity that Christ willed and prayed for in John 17. There is the same spirit of "prove it!" that drove Luther. Ironically, this is not a spirit of Faith. It is a spirit of "I know". The catch is that it is the rationalist approach that feeds atheism as well.
To me, it is a wonderful thing for God to order his household with a hierarchy to govern his people. It reflects the fact that divine truth is revealed. The alternative is almost a mob of sheep who teach themselves, a flock that will not accept leaders unless they first prove themselves to the sheep.