Joseph Wecker's song about a binary computer code wasn't exactly a chart-topper, but he doesn't think MP3.com should have banned it.

On one hand, as information has grown more valuable, copyright and trademark law has become increasingly restrictive. At the same time, there has been, in the words of MIT media studies professor Henry Jenkins, an "explosion of grassroots, participatory culture," a new high-tech folkway that not only draws on pop culture but appropriates from it more easily than ever before, and disseminates itself on a wider scale.