Yes, but you know how prone to drama guilds can be. It puts you smack in the middle and if they don't like what happens, you're the one that gets the short end of the stick!
This is also why GMs or volunteer staff can't get involved in the middle of some things, even to holding items for a player while they xfer them: If anything happens, i.e. accidental disconnect, and either you can't get back on or the item poofs, YOU are the one held responsible and it becomes a liability issue.
It only takes one person to get their nose bent out of shape and you wind up having to change avatars/servers/games! Reps are much too important and look at the squeeky wheels (right or wrong) that get all the attention! And, a guild can't get GM preference, either, so a mediation guild is putting itself at risk right off the bat! (no, Curt...not THAT kind of bat! And, btw, grats to the Sox and the Celts last night!)
I know what you're thinking, but I see too many holes and issues.