Not true, I just unplugged my network cable and I am making this post from links over a serial TTY from a FreeBSD machine at 9600 baud.
Suck my balls. I should modify VNC so it works over RS232. Then I have all the games of Windows and the same browser I use anyway on BSD. Might get a bit difficult to do pulseaudio without slip though, and then I am using IP and that is cheating.