Hello,
on my server there was a way to farm alot of reputation for any faction where you get rep for killing mobs in an instance. You could get from the quest in the Draenei starting area. You could use it to spawn tons of level 5 murlocs everywhere!
So, get the item, go in an instance where you get reputation for killing mobs, spawn a few hundread and kill them with a single AoE attack. It took me about 5 minutes to be exalted with any faction I wanted.
Was tested and worked on a 2.4.3 ArcEmu server. Got fixed after lots of months, thats why I share it.