Explore a 28-minute Black Hat conference talk on using a Raspberry Pi to detect if you're being followed. Learn about a methodology for analyzing nearby wireless signals using low-cost, off-the-shelf components and Python code. Discover techniques employed by professional SIGINT teams, including creating ignore lists for friendly devices. Understand the challenges faced during development and field testing, such as dealing with MAC address randomization. Gain insights into building your own tracking detection system using readily available parts. Access the released code to implement this solution for personal safety or to protect others who may be at risk of being followed.