This reminds me of an MMORPG, Perfect World. Character customization is a significant selling point for the game, and works by one using the in-game program to create a Notepad text document, which is uploaded into the game server upon character creation or editing.
This leaves users with an opportunity to play around with the clearly labeled integers, and make the character's features significantly more or less than what is available by the in-game program. (Surprisingly, large heads are more common than digital macromastomy) The official stance is that any editing of these files is considered altering the game's files- which is against the Terms of Service, and thus a bannable offense.
On one hand, I can understand not wanting hideously proportioned visual monstrosities, but what I would consider more reasonable illegal character editing itself does occur. The Werefox class, for example, has mandatory animal appendages, and for some reason the color of the standard-issue bushy fox tail can be edited by this method. Simply a color change- no size hacks, no texture changes, nothing else. If one moves the hairstyle files from one race's files to another, an elf or human could have the hair of the tideborn, which is far more intricate and rendered with more care than those for the other races.
There is a cash-shop item that allows you to access certain features normally unavailable in the character creation, but a blue tail and an elf with a seashell headdress are not, and have not been available (without exploits) in the half-decade of the game's availability, and after all this fuss, I doubt it never will. I still do not see why it is considered a bannable offence- it is purely a cosmetic matter; if done in good taste, should it be so harshly condemned?
Yes, I played around with this feature myself for a while, but I did not want to make a move that would get me banned thirty or so levels down the road. No seashell hair for my elf. I must admit, however, that all my characters boast physiques larger than what the sliders have to offer- though not a single person has yet to notice the fact that my characters have a healthy BMI, rather than the otherwise mandatory fashion-doll physique.