This article focuses on how many different companies are being labeled a patent troll. Patent trolls are defined as corporations that buy patents from other companies with no intention to commercialize products relating to those patents. There are fundamental problems with these labels, including the lack of a clear definition. Many of the so-called trolls benefit the patent marketplace and support the themes underlying patent law. The differing views on trolls are discussed and an overview of U.S. patent law are included.