No, I don't stalk the postman! What type of a crazy person would do that?
Instead, I built a little robot that looked like a letter and put it in my mailbox. When the postman took it, it activated, crawled out of the sack, and attached itself under the truck. It has a GPS device that I track using an old Soviet satellite that is in low earth orbit utilizing a phase inverse long-range microwave signal at 1381.05 MHz. I then programmed an app for my Android phone, so I always know where the postman is located, how fast he is traveling, and what he had for lunch. I've only recently discovered that the frequency I use is for remote nuclear detonation sequence codes, so I'm really hoping that doesn't cause any issues with national defense.
Vape on!