I guess it depends on whose diary it is. Some people make me think I don’t even want to know.
Morally though, it is wrong in my opinion. Thinking about doing it to my nearest and dearest gives me the ick.
If it’s a blog journal and it’s interesting I say why not.
Also if the person is deceased I guess it could be ok depending on what information you hope to aquire. That answer is a rabbit hole of circumstances that I could write a novel about.
