In some states children may not be able to be disinherited totally. Parents may then leave then $1 to fulfill the legal requirements.
In other states, spouses cannot be disinherited.
But I have seen jw/df'd jw close family work together on this without being cruel to one another.
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I might add that currently the policy is to "punish" active jws that attend weddings of inactive jw family members or active jw family that marry non-jws, removing them as elders and/or MS, and taking them off the pioneer list.
This wasn't true 20 years ago in that the BOE in general did not make jws adhere to their policy but let each person make their own decision. Thus I saw elders attend a wedding of a jw family member (see above) and other jws stay away.