Prisons are starting to get reviewed on Yelp, with past and current inmates commenting on factors such as a given institution's black market in illegal drugs, or the products available in its commissary. Still, it's unclear what potential convicts are supposed to do with the information they find. "[T]elling a judge that you'd rather not go to a particular detention facility because you read on Yelp that its commissary prices are high is probably ill-advised," Drake Bennett writes.

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