One danger with this approach is that a given contributor could start producing low quality content once s/he has been vetted. For example, if the bar for the Entry Exam is low, a spammer could invest a bit of time to pass it, and get entry into the system.
Therefore, complement a-priori vetting of contributors, with occasional, random spot checks on the quality of their contributions.
Links to related patterns
- This practice complements Entry Exam.
As of November 2011, the World-Wide Lexicon project is working on an approach that will include random spot-checking.