I'm sure someone has already mentioned this before, though, it kinda came to me because of all the hacking that has been going on lately.
My friend's account got hacked a few days ago, took all his stuff, and since him and I own a guild with like 4 tabs full of stuff, of course he had access and well, they stole all the goods from in there as well.
I thought that this might help prevent it.
What if Blizzard came out with a password system for Guild Banks? Something that you would set upon creating a new guild and only the guild leader would be able to change it or something? I'm sure some of you would ask, well, what if I forgot it? Then, the safest way would be to put a ticket in to either change it or retrieve but after filling out some information or something?
The password would have to be given out to all members of course that would need access to the bank, though, it could only be for when someone tries to take out items that they would get prompted to enter the password. This way, members can still deposit without worry and hackers wouldn't be able to easily rob guild banks as well? the whole permissions would stay in place of course.
I don't know, just an Idea. Possibly lame. Just throwing it out there.