Who uses p2p?
P2p is just a way of organising computers to share files over a network, and it is not in any way bad or illegal. The files that are shared may not have been properly licensed, and they may contain illegal images or malicious programmemes, but the p2p network itself is not illegal. Some very big organisations like the BBC use p2p networks. When you download a BBC show using their iPlayer service it is using a p2p network called Kontiki because it is faster and more reliable than having the programmees stored on big servers at the BBC.