I don't know if this is a bug or something. I noticed it some time before, but I thought those members had visitors messages turned off. Then a few days ago Mastersarge posted on my profile and I couldn't answer him, because I can't see his profile wall. What I see is this:
Not just this, I noticed I can't see other profiles as well, for example LDX's, robinou's and so on. What's interesting is all those members joined after me.
It's not that I really care, I'm just curious and wanted to point it out.