Frog writes "The New York Times (reg. req'd) writes about a study by the Xerox PARC Internet Ecologies Area which shows that only a small percentage of Gnutella users actually share files -- the rest just take 'em. The researchers note it's 'hard to generate spontaneous cooperation in large anonymous groups.' As a consequence, the system has degraded performance, and is more vulnerable to censorship or legal action. Maybe the solution is to implement a market system for resource allocation, but how to prevent cheating?" Reminds me of the BBS days of file ratios - 'course then we'd just take an image, resize and upload it, so that idea didn't exactly work as intended.