I'm in the middle of a project where the IT guy gets all of his info from Amazon reviews. When I saw him struggling to make a cable, I showed him my PlatinumTools EZ-RJPro crimper. A couple days later he came in and out of the blue goes, "I looked up that crimper you use. Yeah, it didn't get that good of reviews on Amazon". I pointed out that amazon reviews are from idiots that don't use the tool on a daily basis.

From what I've seen on Yelp, it looks like the same people that write reviews on amazon write yelp reviews.