Passwords on computers

So this has been on my mind for a while and I wanted to know what other people think about it.

It has always annoyed me to no end that guests will use your sims' computer unless you put it behind lock and key. This is something that just seems really weird to me. In real life you wouldn't go over to someones place and just start using their computer, at least not without permission.

So if our sims could put a password on their computer guests wouldn't randomly start using it.

What do you think, is this something trivial to you or do you agree that there should be something like this?