Wikipedia: A Case Study of User-generated Content (UGC) and Crowdsourcing

It is a question of time before the Wikipedia self-destructs and implodes. It poses such low barriers to entry (anyone can edit any number of its articles) that it is already attracting masses of teenagers as "contributors" and "editors", not to mention the less savory flotsam and jetsam of cyber-life. People who are regularly excluded or at least moderated in every other Internet community are welcomed, no questions asked, by this wannabe self-styled "encyclopedia".