World of Warcraft's Corrupted Blood pandemic from back in 2005 is one of the most notorious, and yet fascinating, things to ever happen in the game. It even has its own Wikipedia page titled "The Corrupted Blood Incident." For those who may not be familiar, basically what happened was that there was a debuff associated with a certain boss fight at the end of a raid. The debuff could pass between players in close proximity, and while it was intended...