Heres the skinny: Blizzard adds in a new instance, Zul'Gurub. Inside is the god of blood, Hakkar. Well, when you fight him he has a debuff called Corrputed Blood. It does like 250-350 damage to palyers and affects nearby players. The amazing thing is SOME PLAYERS have brought this disease (and it is a disease) back to the towns, outside of the instance. It starts spreading amongst the genral population including npcs, who can out generate the damage. Some servers have gotten so bad that you can't go into the major cities without getting the plague (and anyone less than like level 50 nearly immediately die).*Belly Laugh* ye a self inflicted virus running through their servers passed from player to player. Once you get infected you have two options, either live and spread the virus or die.
GM's even tried quarantining players in certain areas, but the players kept escaping the quarantine and infect other players.
And Here is a video of it from one of the towns. If you read the chat log you will see people talking about haxors and exploits, but it is none of these.
I have hared of bad things resulting from developer interaction in MMOs, but this takes the biscuit.
