Customers of Walmart.com, Sears.com and Amazon.com have taken up social media arms today over an item sold by third-party resellers on each of the three respective sites, resulting in the “Dead Dog Prop” vanishing quickly from listings. The product description reads: “Foam filled latex prop of a skinned dog with a large tire track squished through its mid torso. Chain attached for dragging purposes. You have seen bloody road kill, this is bloody road kill.” As of this writing, the three companies above each had a number of customer complaints on their Facebook pages as well as expressions of outrage...