This little gem of a Raspberry Pi-based tool allows anyone to anonymously access wifi from up to 2.5 miles away from a wireless access-oint:

Proxyham is composed of a WiFi-enabled Raspberry Pi computer and three antennas setup. One of the antennas connects to a source public Wi-Fi network while the other two transmit the Wi-Fi signal at a frequency of 900 MHz.

Therefore, this appliance works very effectively with a radio connection of 900 Megahertz. It is capable of connecting distanced Wi-Fi, at a range of 1 to 2.5 Miles. Though several interference factors are considered.

In case some spying agents manage to track the target’s internet connection they will only be able to disclose the IP address of ProxyHam box which would be transmitting some low-level radio signal thousands of feet away at different direction.

Caudill disclosed that he along with some of his colleagues are working over a Motherboard with an additional feature of self-destructing the ProxyHam

So basically, you can be 2.5 miles away from your BFF’s house and still use their wifi without their knowledge. Imagine the impact this will have on court cases relying solely on IP address information to prosecute online criminal activity.