Picture the situation:
A JW sister, let's call her Marjorie, has a non JW father who died. She arranges for an elder to take the funeral at a crematorium and Marjorie's non-JW husband pays for a reception at a pub afterwards.
Marjorie has a disassociated son. The elder taking the funeral tells Marjorie that she needs to tell her son he is not welcome at the reception, otherise none of the JWs can attend. The son goes anyway so the elder tells Marjorie that he and the other JWs at the funeral cannot eat with a disfellowshipped person so they aren't going. Marjorie is distraught. Marjorie's husband is livid that he has paid for a reception and his wife has been put through this upset.
Way to go WT, you don't look like a cult at all.