Assume good faith is a fine principle, but the suggestion here seems to be that editors must engage every such page blanker in dialogue based on the remote chance that they just might have a good reason for doing it, even though they didn't bother giving it at the time. That just doesn't seem worthwhile to me; the effort involved seems disproportionate to any possible harm.

Depends. The possible harm varies. Sometimes the possible harm is libel.

Dan