This is the deal the Forum records the ip address of the main modem. So in theory thenightmare/hyma$$ could correct with the whole IP address situation. The Forum administrator might have a more developed system when you can record the subnet mask IP address but I am not sure if they have one. It is actually simple to test it get 2 computers in the WAP or WEP protected network and go to a ip address detection site, and if you notice they both have the same IP address, even thought they operate under different ones.
Do I believe Thenightmare, maybe it could be possible, but I have to be honest I have my questions about it. As long as they stay calm and stop insulting people with controversial topics, I think they should be fine. But what I find funny is that the conversations just go between each other, if they are friends they could just talk about it in school, why do it here.