The Thing is, even if you looted them the percentage of the alliance bank is going to be so small because of member count that it wouldnt even matter if they never sent their bank out to NPO and their offshores.
I Dont think anyone should be banned or anything just for being inactive drones, but maybe the member cap of 300 proposed by the false god could be beneficial, or instituting a minimum % to the alliance bank loot percentage formula somehow.