The trouble with CGM

The notion that consumer-generated content lacks authority is not a new one of course. Wikipedia has been in the middle of this storm for a while now, and then there was that recent report (I wish I could remember where I saw it) about the proportion of web content ranked highly in search results that is generated by teens.

This morning I found this collection of bad user-generated reviews of great books (that is, books commonly understood by scholars to belong in the canon of great literature).

Does authority matter outside the context of scholarship or government?