Getting an Earful

There's No Justice, Just Us is an unmarked and repeatable quest in Fallout 3.

Synopsis
Now that the Lone Wanderer is an associate contract killer for Littlehorn and Associates, they are now a cog in the – incredibly evil – machine, slaying those with sound mind and morals for whatever vague and conspiratorial reasons Daniel Littlehorn refuses to say.

Walkthrough

 * 1) Kill a good non-player character.
 * 2) Loot the ear from the corpse.
 * 3) Return to Daniel Littlehorn.
 * 4) Receive compensation.
 * 5) Repeat.