I am not minimizing the need to allow the husband the space to do his personal recovery work but y'all are really being hard on Alone22.
As untidy and uncomfortable as it makes those in AA/Al-anon feel that she did read his work, recovery is hard and messy. He is a big boy and it was on him to treat his work/journal with some more importance, not her.
To me it is more reflective of how he is handling his recovery: disorganized and still not seeing how fallout from his actions (whether on paper or in person) affect others.
It isn't her job to protect him from consequences, no matter how they come up.
Some of what I'm reading is like 'blame the victim' stuff or 'that's what you get for looking' type of responses and to me that misses the point of why she posted this in the first place. She is hurt and confused and has every right to be.