re: Defining yourself by what you post
I certainly hope not.
I hope and I suspect that there is far more to the people here than the political scraps and musings that we see on this forum.
There may be some on the internet that pour out their soul to the point that they are defined but there are also many who are just playing around and jousting. Either way, we don't really know them.
There has been at least one of ours (in the distant past) that was almost certainly a purely fictional persona.