I'm one of the people who makes a lot of private posts for my own reference as well - so I definitely agree that being upset because you can't see someone's latest post is a silly thing. Unfortunately, people are not always sensible creatures. I have actually known someone who once had to switch journals entirely because they had someone who stalked their profile for updates, and would then hound them demanding to know what they were hiding. So it can definitely be a real issue. (Whether there's any kind of viable solution though, I don't know.)