Actually, the more I think about it, the more I think delta is on to something. It's like he's made a post-modern statement with his post, using silence as a way to allow the reader to fill in what he could have said. But by doing that, he gets you to think about all the things that he didn't say, thus putting them in your brain. So, in a way, isn't he actually saying those things to the reader, subjectively? A silent statement on the absurdity of the post-modern post.
It's like a blank canvas that engages the viewer in the question of what art is, or in this case, what is a post?