I support the original poster for being upset and what was obviously a well-intended feature that got abused. Of course, the game seems to have a history of good ideas that are abused by that portion of the player-base that exists to cause mayhem and grief.
As already pointed out here, if it is primarily intended as a banking guild, then don't have anybody in it you don't know and trust. It's not uncommon to see someone selling a guild in trade, and it can be quite a bargain ... especially if the guild name is not repulsive. Storage in the game is a pain in the behind, especially if you have several "gathering" toons, along with bunches of old armor or other items you might hold onto for various reasons.
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It smells like the left wing of the day of judgment.
- Herman Melville