I just did a quick search on certain keywords but didn't find any specific that states that you can't host servers. http://www.hkbn.net/TC/00_right/pdf/HKBN_Gen_T&C_Eng%202...
I know this is true for more US internet providers that I know of. Until recently my Roadrunner had port 80 blocked (now its open last time I checked). I still have the same ip I had 2 years ago since I moved to this house, even after flushing the modem (they replaced it after it went bad). I know this is not normal, but even with dynamic ips they don't change it that often, if at all. You could always use something like http://www.dyndns.com/services/ for dynamic ips.
Either way, it was just a thought experiment like "What would you do if you had this much speed?". Its impractical and risky anyways.
I remember reading when plentyoffish started out he used to host his server in his home. I think he moved his server to his new office now.