An interesting question, no? I must admit, I have quickly browsed an open diary, many years ago. I probably wouldn’t now, unless reading it can help me to help the owner or further understand some of their life choices.
Humans are curious by nature knowing me I would be interested in knowing what was in it, but I’m honest too and wouldn’t want anyone reading my diary without my knowledge so my answer is I would close it.
When I was younger, maybe. A very strong maybe but now as an adult definitely not.