I went questing with one of my friends the other day, and I saw he was no longer in Citadel. (hes smart but sometimes doesn't see whats right in front of him), I asked him why and he said: 'What?' I am not in a guild? I told him you don't have a guild name under your name and he looked under guild and saw the Citadel was disbanded.
But it was such a prestigious guild!