Friend or Foe/Playing With

Basic Trope: Characters in a conflict can't tell who's on their side.
 * Straight: Characters shoot at, or avoid, their own friends.
 * Exaggerated: Characters shoot everything that moves even though they know they have friends about.
 * Justified: As in Real Life, the Fog of War can make it very hard to tell.
 * Inverted: The Medic with the Healing Shiv wants to shoot only his friends, but finds it hard to tell which ones.
 * Subverted: Uniforms make it clear.
 * Double Subverted: Until Dressing as the Enemy occurs.
 * Parodied: Characters are baffled in a paintball fight -- where the balls shoot Instant Allegiance Artifact.
 * Deconstructed: The characters have been rendered so paranoid by war that they can't tell who is who anymore.
 * Reconstructed: That's because of how hard it is to detect.
 * Zig Zagged: ???
 * Averted: Friendly Fireproof
 * Enforced: "We don't want to glamorize war, so let's depict battles as gritty, confusing scenes where the hero can't even recognize his best friends."
 * Lampshaded: A character asks "Why Don't Ya Just Shoot Him"
 * Invoked: One character is The Mole, who takes advantage of the confusion of battle to murder a target.
 * Defied: ???
 * Discussed: ???
 * Conversed: ???

Back to Friend or Foe, scumbag! Or I'll-oh! Sorry, sir! Thought you were one of them, y'see..