I see where you are coming from here. I was a long time lurker on this board even before I registered, and then a longer time lurker even before I posted for the first time. I've been member of many discussion boards over the years, and frankly I consider this one to be one of the "better behaved" ones. I've been on other boards where someone will post a photo and the very first post will be some idiot saying "that looks like c-p!"
Your comment is a subject that I have seen discussed on every message board I have been a part of. People post photos/content, then get fed up if they don't get enough responses or "thanks". It's easy to say "who cares" but the reality is we are all human - social creatures. We may not care at first, but after awhile we start to wonder if we are wasting our efforts, and if we should move on to other endeavors. If people post photos for the point of sharing with others, they lose interest if they don't know that people are actually looking at what they shared.
Roger, I will say that your photos are one of the reasons I kept coming back to this message board back when I was a lurker. Even if people aren't commenting, they are appreciating what you post.
Kevin