I had some ideas about expanding craftable traps to include effects which don't deal direct damage. These would primarily be useful in RP, rather than for dungeoning. These would all require custom scripting, of course.
Jingling bells or a high-pitched whistle. When triggered, sends a yellow-text alert to all PCs in the area, similarly to how doorbells work, alerting that the trap has been triggered.
Indelible Ink Trap
Sprays the victim with ink, paint, or some other hard-to-remove substance. Applies a persistent VFX to the target. Catch that thief red-handed!
A good old-fashioned mantrap. Holds the target in place for a set duration.
Spike Trap - Bleeder
Applies the Wounding effect to the target.
Spike Trap - Poison
Applies the Poisoned effect to the target. Could possibly even integrate with the custom poison system!
Other suggestions or vicious slapdowns welcome!