Luxembourg-based patent troll ArrivalStar has sued a number of U.S. transit agencies and other defendants for infringing on patents that probably shouldn't ever have been issued. For instance, patent 7,030,781 generally refers to a technology that notifies you if your bus or package is arriving early, late, or on time. Despite the fact that automatic vehicle location and package tracking technologies had already been proposed, prototyped, and patented, ArrivalStar still managed to secure a patent over the technology.