James I believe this is a very spiritually mature peice of advice. Esp the bit about separating out private and public Forums.
My only reservation is that you give the impression that a Priest somehow has the authority to say that a human act that is determined to be contraceptive is permissable with his permission and ongoing evaluation of the situation. This would be incorrect. Not even God can say that something intrinsically evil is somehow not intrinsically evil. He can of course forgive.
What I understand you to be really suggesting is that in cases of confusion and great anxiety (such as these) a priest may objectively determine that a person may not have full knowledge or freedom of will and that, given these unique set of circumstances, this person cannot be reasonably assumed to be sinning mortally.
There is also a world of difference between:
(a) a priest actively counselling someone not to keep using ABC and
(b) the same priest NOT actively counselling someone else not to keep using ABC

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