Today I was playing on my Death Knight and was busy leveling in Grizzly Hills.
Then i aquired the quest "The Iron Thane and His Anvil" or the Horde equivalent: "Bringing Down the Iron Thane" Which let's you ride a so called Charged War Golem.
The fun part of this Golem is the fact that people can't see who's riding it they just see the name "Charged War Golem".
First of all I found out that I could attack opposing faction members, this was fun given the fact that they couldnt hurt me (they just hurt the golem) and I could fairly easily kill them.
Then I started to act like a mob (patrolling and just walking around), you know just check out if people would fall for it. And they did! I had it happen multiple times that players attacked me and did not act in a PvP way (You know jumping around proccing cooldowns and such).
After testing around I found out you could always rebuff the golem. E.G your golem dies but you just re-press the item to summon him and tada you got a fresh golem.
The other thing I found out is when you enter the golem you can move to everywhere on the map, meaning it isnt restricted to the quest zone (just entering a golem is restricted to the quest zone)
So have fun fooling people into thinking your a mob and kill them!
Here are a few screenies:
Me attacking a player:
I'm not losing HP I just had low hp when i entered the golem 
Me in another zone:
by Fezz0