Web 2.0 offers almost all users the same freedom to contribute. While this opens the possibility for serious debate and collaboration, it also increases the incidence of "spamming", "trolling", and can even create a venue for racist hate speech, cyberbullying, and defamation. The impossibility of excluding group members who do not contribute to the provision of goods (i.e., to the creation of a user-generated website) from sharing the benefits (of using the website) gives rise to the possibility that serious members will prefer to withhold their contribution of effort and "free ride" on the contributions of others. This requires what is sometimes called radical trust by the management of the Web site.