I understand what ur saying.  I'm lvl 65.  I was going to run some guildies through SM.  We were going to meet there and didn't have a party yet.  I noticed one of my guildies who is lvl 37 behind me.  We landed in SS together and I have a mount.  So I'm going down the road and pass a lvl 51 Horde warrior, just keep going.  I decided to turn around and follow him and sure enough he attacks my guildie lvl 37. Of course, I take him out. I know that this is just one example and in any argument you could come up with specific examples. 

I hate it also. Now as I'm closer to 70, I still can't beat a 70 but I don't get ganked as often, obviously.

I see what you are saying but your example is not affected by my idea.  You are lvl 65 and he was lvl 51, this is only a 14 level difference, so no honor lost.  Also, even if you had a bigger gap in levels, you could group with your guild members at any time and thus, if they are attacked, you can defend them free of worry.  You may have misread my idea.  Again, the general premise is to prevent high level camping in low level zones.  Not to prevent normal interaction in the world.