[adamtulinius]

World of Warcraft has the same problems, where it's possible to position your character at random places in the air and stuff like that. (among others used by people advertising for their gold-selling sites by making a lot of characters fly through the air to form words.)

[jamesaguilar]

There's a video of a guy being permabanned for doing this within a few minutes of starting, but damned if I can find it right now (it featured a teleport/underground mining hack).