The opportunity and options for online user interaction span a continuum from the tightly controlled, such as moderated message boards, to the organic, dynamic and unconstrained: think of sites that are almost completely comprised of user-generated content, like MySpace, flickr, and YouTube.
Sites in the latter genre grew and thrived in an environment of chaotic autonomy. However, their success has raised their profile and invited the attention of the corporate sensibility; the prominence of YouTube, amplified by Yahoo���s acquisition of the site, has resulted in a trend toward censoring or restricting contributor content.