What we have here is a failure to communicate.  The LLC should know that there is one person (or more, if you choose) who is responsible for providing information needed for tax preparation, and for communicating to other members the status of the return.  The designated individual(s) should be aware that all inquiries from other members should flow through them.  

Same situation applies to estates and trusts.  There may be five beneficiaries, but there is one personal representative or trustee, and that person is the contact point in both directions.