Nowhere is the Internet's democratic nature clearer than in the user-generated reviews on such websites as Yelp and TripAdvisor. All it takes to weigh in on a restaurant, hotel, spa, bar, bowling alley -- anything, really -- is a username and password.
While they're a boon for consumers sharing unfiltered ideas and opinions, there are obvious hazards: What can be trusted? How do we know a hotel owner hasn't put family members up to clogging sites with positive reviews of his property and negative reviews of his competition?









