Call me crazy..but I am thinking that there is a way people can see the IP address on posts (or at least who is on-line) on GT of the ISP that the poster is on.
Is there actually a way of seeing this, or am I imagining it? I could just be imaging it, but a comment in passing leads me to believe that it is possible.
Of course the other conclusion is I could just be crazy.
I am sure the site logs it and probably available to the Mods what IP address the person who posted was at. From there you can generally track ISP and even basic location on the planet.
If they make it available for each post is up to them but I have never seen it.