quit from zombie organization he/she been added in

as a user, once be added to an organization, if he dont have admin permission, he cannot quit from that organization.

we found some organization is owned by zombie account (those user no longer use), and as a user, we got a long list of organization which not active. we need a method to clean those zombie organization. and it will also considerable to have a function for a user to quit from the organization he/she been added in