There's very little in World of Warcraft that summarizes lazy design better than the yearly troll instance. Created from a race of people who honestly believe in the inner power of spiders, bats, and snakes, troll instances epitomize what happens when you give your design team very little creative room to work. Every year, like a strange Halloween gone wrong, Blizzard forces another dose of Troll Instance Terribleness upon the unsuspecting denizens of Azeroth.

Here's a quick list...

Anias