If you type /halls on our server you will notice that there is a lot of lv 80 hunters running around in Shattered Halls. I went down there to see if it was just bugged, or something. I sat there for no more then a minute and saw about eight hunters fly into the instance Horde and Alliance . Also if you inspect them you will notice that they have the same gear. I would put a few names so you can compare but its against the TOS to be doing that on the forums.
How you can help:
Report this to the GM's cause I'm sure if enough of us report this something will get done. also manually report them.