If your college is providing your internet access, it would be possible for your college to put up a firewall to block all the major gnutella peer to peer communication ports. This would include 6346, 6347, 6348, and 6349. I know that there are others for other file sharing programs, but I can't recall off hand what they are. But not all the material on the Gnutella network is copyrighted, and this would block people from reaching "legal", unpirated material. It's kinda like the old saying (if it is a saying) goes:

You are given tools to work with. You can accomplish good things with them, or you can choose to to bad things with them. What you do is up to you.

Take for instance, a car. It is a tool that you can drive around for transportation, or you can use it to run some innocent pedestrian down. Just because people can do bad things with tools doesn't mean that the tools should be banned. The people that are using the tools unwisely should be disciplined. The debate taking place in the courts right now is this: Is sharing copyrighted music over the internet illegal/bad? Even if they deem this illegal, Napster should not be shut down, but there are exceptions to the saying.

This is an exaggerated example. Plutonium can be used to produce electrical energy. But it can also be used to make bombs, BIG bombs. Should we ban the tool? In this case, yes. Most of the time, the tool will be used for bad purposes. If the courts decide that file-sharing is used primarily for bad purposes, they can take it down. As we have already talked about, that will be an impossibility, but they will try nonetheless.