orx: That's why it's good to first of all make the clan, meet the people and THEN introduce the bank IF people want it that is. Our clan has been up and running for a year before we introduced it. And even then it was voted for. Only 2 people didn't want to be a part of the system (we kept it to farmed items at first), those 2 were Tyrannus_Emp and Priest_Bob. They bosshunted behind everyone's backs, kept drops, traded their clandrops for Bob's chitin shield and later left the clan with clan items.
They're perfect examples of what can go wrong with the bank-system. Anyway, make sure that everyone wants the bank system and be patient. It may take some time but after a while you'll get the hang of it