Before the Internet
In the dreary days before the Internet was born, people huddled together against the cold in straw huts. Only the whims of small, straining fires warmed them; there was, as yet, no monitor glow or exhaust wind. There were many needless deaths.
There was no wall, feed, or stream to communicate with, so they were forced to articulate their important thoughts, describe their daily achievements, and share amusing anecdotes, through the use of crude auditory communication systems. Essentially, one would make a series of gross sounds with the mouth and throat, and another would attempt to correctly interpret these noises. As you may imagine, they often misunderstood.
On very special occasions, one band of soulless primitives might dispatch a representative to another, nearby band. This brave individual would set out with nothing but his intuition and a few crude suggestions to guide him; there was no Google maps, you see. These specially gifted emissaries evolved into postal workers and couriers.
Those who tended the pitiful but necessary fires also developed particular traits of their own. Eventually, they managed to use their time spent staring at glowing sticks and coals, and standardized their systems of communication. Unfortunately, their melodic groans and scratch-marks were utterly unintelligible to the majority of their huddling brethren. So it was that fire-keepers preferred the company of other fire-keepers, even as they were each responsible for their band's well-being. These would, when the Internet was finally discovered, evolve into moderators.
I encourage you to research more of the dark past for yourself. While dismal, it is certainly fascinating.