The kids should not be removing some of their Dad's work. His struggles with alcoholism are well defined in the public and him describing his struggles could help another facing similar problems.
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In fact I think all now-dead authors should have their work as-is protected to a fair degree.
Dollars to donuts that the anecdotes revealed something either embarrassing or personally connected to the family members, it's just easier to posthumously blame the drinker.
I absolutely agree that shining light onto the subject of alcoholism is nothing but good for those seeking to avoid the horrible problem.