I posted that it didn't make any difference to me, but then got to thinking. I'm not worried about the comments, but for the posts where the pictures are gone, you should probably remove them, since they are no longer contributing to the thread. Perhaps you could first contact the poster to see if they wanted to fix it. Or, if that's too much work, make an announcement that posters have until a certain date to fix it, then delete them after that date.