I was over at a friend's place today and he has cable.I had an idea while I was on there..let me know if it seems feasible:
P2P as I've seen it,is slow for dialup users for obvious reasons of speed.However,it offers users wth cable/dsl/whatnot a much better chance at sharing files.(I'd like to clarify here btw that I don't support music piracy).Now,considering a case in which a bunch of cable users with the same provider and the same general area got together....there'd be a fairly high chance they'd be connected to the same router I think?(this part is pure conjecture,is the reasoning right?) thus creating a virtual LAN of sorts...which could then be used to share files.Now,this is fairly normal..what I was wondering was that what would happen if certain users discontinued their service with the provider...since they'd be still able to send raw packets over the cable modem,wouldnt they still be connected to this LAN and thus still be able to share files?(You have a p2p application installed on every computer and sharing's enabled obviously).Also...what's to stop another user from setting up his computer as a server and allowing other computers to connect to him and thereby go online?(assuming the computer has the resources).Also...if p2p sharing were possible in such a way...what's to stop someone with malicious intent from 'taking hold' of the computers on the LAN and using them to mount a Ddos?
It's all a bit muddled up right now so please let me know if this is confusing lol.

Cheers