Reading through the comments of our Protestant friends sort of irked me that they would treat Bishops as any other, but then I'm reminded that depending on the Church or the particular Bishop I run into that I might not give them an accustomed greeting. I would never kiss the hand of a female pastor for instance or refer to them as a Priest or someone who does and celebrates things contrary to the gospel. I wouldn't go out of my way to display this, but if pressed I could not in good conscience acknowledge their supposed position.
So I can understand that protestant attitude somewhat. Especially if one views the whole system of Bishops and Priests as invalid or unbiblical. So I will explain why I would give all due respect to my own Bishop or Bishops of any Orthodox Church. I would do it, not because they are special but because they are the leader of the Church God has appointed for us. They handle the administration, they handle the Eucharist and unless they have been seriously compromised or involved in serious corruption, I see nothing harmful in kissing their hand, asking for their blessing or genuflecting to them. They have invested their lives in being spiritual leaders guides of the congregation which to me requires some recognition.
I'm also not opposed to those secular honors we pay our higher ups, be that Queens, Kings, Dignitaries, Priministers or Presidents. It just strikes me as proper.