I'm a noob, but I believe that earlier versions of this existed.  It didn't work too well so Blizzard got rid of it.  Say you're running with one of your low lvl guildies and he gets attacked...you can't help defend?

Everyone has gotten ganked. Sometimes you're just trying to finish something and it sucks but you know what deal with it or transfer to a PvE server.  Just remember you'll be up there some day.

I am not saying you can not defend if attacked.  As I said in the original post, if you are in a group or if you are attacked, then you can freely defend yourself.

I do not mind getting ganked, happens to everyone.  What is annoying is when lvl 70 characters camp low level towns and just sit there all day.  My idea is to bring some honor back to the honor system.  Again, what is the point of killing level 30s when you are lvl 70?  No challenge in that. 

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.