Outsiders sometimes see the Mess as a dangerous place. So, some choose to visit via the telepresence drones. Named after pure RGB colors, there are five at present, with more, perhaps, to come.
If you see a guest-drone, be kind to it.
Drones are designed as a safe interface to the Mess for those outside it. As such, they are primarily inteded to insulate the remote host from any dangers of the Mess. Their design represents this. Guest drones are built in layers, each deeper layer protected from the outer layers by increasingly sealed interfaces and firewalls.
Known guest-drones so far:
Also see 10FC04.