WoW Guild Banking FAQ (Patch 2.3)
This just in from the Official WoW forums - NOT written by me, please see this post for the original writer, Evol from Chupathingy:
Why Guild Banks?
Guild Banks were introduced in patch 2.3 in order to help reduce the need for player created banks, and also to reduce the temptation for “account sharing” which sometimes happened […]

