Glossy is a reliable and low latency flooding mechanism whichmakes use of constructive interference. Therefore, it is important to investigate what happens when attacks aremounted on Glossy that try to break constructive interference. In this chapter, we explore the effectiveness of different methods of breaking constructive interference in Glossy. Our results show that Glossy is quite robust to approaches where nodes do not respect the timing constraints necessary to create constructive interference. Changing the packet content, however, has a more tremendous effect on the packet reception rate.