Change Guild Tag

I saw another post on here about making it so that guild tags could not be repeated. While I feel that's a little exteme I think you should be able to change your guild tag if you enter a situation like I got myself into.

When I created my guild I wasn't worried about a guild tag because I didn't think it was all that important (was still a noob at the time). Now that the guild is growing and I know more about the game I regret making my guild tag what it is. It would be nice to have some sort of way for people who put themselves in my situation to change the name of their guild tag so that they can get the full effect of a guild... individuality.