No joke, when I got my own place I replaced the main bedroom door for a thick, annoyingly heavy, solid wood door almost immediately. After experiencing how easily the childhood door was defeated, I sleep a bit better knowing there’s a “strong” door between me and potential intruders…
The next weak link is the doorway framing, but unless the FBI are coming in I think it’s good enough.
All I’ll say is, I beefed up my bedroom lock when I still lived at home, I was maybe 13. I thought I was pretty clever installing a padlock and security bar. That would give me privacy for sure!
Well, for all my hard work, it only resulted in my father smashing the door apart and removing it entirely the first time they wanted to enter without permission. That was the day I learned interior doors are not exactly reinforced, and most are not even solid core… anyway I eventually hung a thin blanket some months later, but I had effectively zero privacy the rest of the years I lived there.
I’d suggest you work towards an understanding with the homeowner before you try removing their access from rooms.
Oh, oh the misery!