> I would be very concerned if people could change the privacy settings on a post after it's been created. Why? Certainly this should be no problem at all if

> I would be very concerned if people could change the privacy settings on a post after it's been created. Why? Certainly this should be no problem at all if the change is a monotonic increase in publicness, i.e. you're not blocking anyone who could see it before. But even if you are trying to decrease publicness, why not? Of course, you can't make someone "un-see" the post, and any feeds or readers that have already picked it up can't be forced to delete it. But, with that caveat, I don't see any problem with making a post more private than it had been, preventing any additional unwanted eyeballs from seeing it.