A couple of days ago one Reddit user had the misfortune to return home and discover something rather interesting hooked up to their router, placed there by their roommate. A cross between a multi-level marking scam and hardware malware, the malicious board had been put into a position that allowed it to harvest every bit of available data from their local network.

Mystery hardware. (📷: u/Wardoghk)
The Friendly ARM NanoPi NEO (📷: Friendly ARM)

Scientist, Author, Hacker, Maker, and Journalist.