So, if you like the little easter eggs that Blizzard puts into Wow, here's one for you.
I was digging around for Ironforge quests to get the last couple thousand rep points to push me to exalted with IF and I found the Sully Baloo Quest Chain, which starts in the water beneath the Thandol Span Bridge. I read the letter before delivering and... ugh. It hits hard.
Anyway, I was reading over the Thottbot comments and someone there explained that the letter is so potent because it is a real letter and Sully Balloo was a real person. The link he gave is here: Sullivan Ballou's Letter.
Personally, I am both saddened by the story and can't help but wonder: where the heck does Blizzard come up with all this stuff?!