None of you are going to believe this:
I was playing on my friend's account (Level 42, I think), playing with a friend, and in the Badlands, I found a place where you could jump up these rocks. After glitching myself up the cliff wall, there was a hole in the terrain. I went through it, and literally fell out of the Badlands. It was a long fall, so I had to heal myself. I was in a flat desert area, with cloned tiles of ground. I got on my mount and rode into the distance. After a while, I found a town in the middle of nowhere. There were monsters lined up EVERYWHERE. A GM logged on, and explained to me that it was a testing area for Blizzard, and they didn't want me in it. Apparently, he wanted us out completely, so they brought in a high level monster, and wiped us both out.
A few days later, my friend went back, and was perma-banned.
True story. I swear.