just a quick note there were people banned for simple addon usage but that dates back deep into vanilla since there is no harm anymore in mentioning the name ill just do it
the addon was called "superman"
some of the features i remember it had
it let your character basicly fly (turn on and off gravity)
make your character invisible (like gm walk everywhere without drawing aggro or beeing seen)
make your character invincible (no damage taken from what ever source)
teleport your character (you could setup x y z coordinates and teleport to those places including save and load coordinate places
detatch your camera from your camera (actually this is still possible but wont go into details how this is acomplished without blizzard noticing)
in the past it was acomplished by exploiting the headnod variable "headboobing" frequency and amplitude which were accessable for clients so you went into ego mode and just let your had bounce a litte more then 2 cm more like 5 km or something and stopped it while you were in the air
you can imagine blizzards reaction to hits but in a sense you are very close with your statment since even blizzard employies are not aware of that things in the past
http://us.battle.net/forums/en/wow/topic/9499700809 here you can see clearly that even blizzard employies have no clue about the history
there was more stuff like that bulk creation of character exceed the character limit bulk setup of accounts multiple character online at the same time from one account it was needed to do stuff like that
http://www.shamusyoung.com/twentysid...w_spammer1.jpg
http://i1096.photobucket.com/albums/...sadsadsure.jpg
so next time you know better there were bans for addon usage in the past with good reason