This document discusses the challenges that laws face in regulating user-generated content and peer production on the internet. It notes that laws often lag behind changing technology and cultural norms. Specifically, it examines issues around copyright and remix culture, defamation in the age of online publishing, privacy in a world where personal information is widely shared, and how to determine liability for user content on platforms provided by internet intermediaries. The document argues that laws need to adapt to better promote creativity, not criminalize ordinary uses or stifle innovation, in order to match the new cultural paradigm enabled by Web 2.0 technologies and services.