My trading guild is doing just that.As has been said restrict withdrawals to yourself and officers. Most guilds do this, a quick pm\email is no bother to anyone.
This.Artemiisia wrote: »guild banks are like a trust system, if you dont want people to withdraw to much, make it so you and some trade officers only can, so members need to ask to get something.
I have see numerous threads in the past, where a single member has withdraw everything and left guild. Remember as a guild master its your responsibility to keep what members trust you with in the guildbank