Proxy networks such as Freenet, I2P, JAP and TOR come together with different levels of encryption. Peer-to-peer networking is also meant to convenient users to exchange information anonymously.
When one opts to use proxy networks, it means that you rely heavily on end-users to contribute bandwidth to the existing network that you are using. Unfortunately, over the years, web surfers complained that these services are relatively slower compared to other proxies. And bear in mind that you also risk exposing your real IP address for certain networks are operated by malicious individuals.