Why Yelp Will Never Be Rid of Phony Reviews

Photograph by Chris Knorr/Corbis

If you build a business on user-generated restaurant reviews, you’re going to spend a lot of time developing new ways to limit posts by shills and scammers. On Monday, Yelp laid out the latest step in its battle to keep its pages at least somewhat credible: a new round of “Consumer Alerts” that warn readers away from listings that seem suspiciously sunny.

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