Ever seen a product given five-star reviews on a website, but when you buy it, you find out it doesn't even deserve one star? As Jack Vonder Heide explained on my America Weekend show today, the problem is the large number of fake reviews that are being posted online every day on Amazon, Yelp, and other sites. Many of those "reviewers" have been paid to say good things about a product -- or in some cases, to say negative things about a competitor. Bottom line: you probably shouldn't believe those reviews at all. Listen, then click here to subscribe to these podcasts via iTunes!