They will, however, engage prisoners from enemy factions. They will not attack natural rock walls (except sappers), wild animals, or unpowered turrets. Raiders will attack, destroy, or burn random targets without any visible strategy or tactic.
Raiders have several strategies when a raid event is spawned.
The group size and strength of a raiding party is determined by 'points', which will be explained in-depth further down this article. Raiders are enemies who attack in groups when the storyteller's threat cycle is active (or any time, for Randy Random).