If you've ever been interested in farming up some Bloody Coins on the Timeless Isle but didn't understand how it all worked, Esoth has a complete guide for you on how to go about doing just that. You first have to find Speaker Gulan and pony up 1000 timeless coins for a Censer of Eternal Agony, and then the fun (if you like killing players of every faction) begins. While I won't try and recap all of Esoth's article here (you should definitely go read it, it's very comprehensive) I will point out a fact I learned from reading it - while under the influence of the Censer, not only are you hostile to all players (Horde or Alliance) who are not under its influence, you are friendly to all players who are - meaning that your undead rogue using the Censer will be friendly to that gnome warrior who had the same idea to go farming for bloody coins. Shakes of the zombie invasion, eh?
So head on over to Esoth's write up if you're feeling like spreading some mayhem. And remember, don't complain when we gang up on you and kill you sixty times in a row so we can get back to farming elites. You asked for it.