P2P is a technique, not a thing
This message to the IP list claims that Tarleton University will “shut down P2P”:
OVERVIEW
P2P file sharing programs provide Internet users with the ability to share files on their computers with millions of other Internet users. Common P2P use includes song and movie file sharing, gaming and instant messaging. P2P file sharing software makes it possible for people to accidentally share personal files or sensitive data. These programs also allow easier access to computer systems for theft of sensitive documents and unauthorized use of network resources. There have been incidents where P2P programs have exposed sensitive federal government documents.P2P file sharing software potentially compromises computer systems. The use of this software creates vulnerabilities through which malicious code (viruses, worms, Trojans, bots) or other illegal material can be introduced.
The use of P2P file sharing can result in network intrusions.
CONCLUSION
Few, if any, university owned computers have an operational reason for running P2P file sharing software. These applications represent a network vulnerability that cannot be afforded without a strong justification.
http://www.interesting-people.org/archives/interesting-people/200505/msg00315.html
This followup message illustrates a number of ways to get around that restriction:
http://www.interesting-people.org/archives/interesting-people/200506/msg00004.html
As I’ve written before, P2P is not a technology, it’s a technique. You can’t just wish it away by eliminating programs or blocking ports. Bits are just bits. By themselves, they’re meaningless, until you apply a filter to them that explains what they are. Once again, all together now. Content is a pattern, not a thing.