The Bug:
You can extinguish campfires with shovels in adventure mode.
A player in adventure mode cannot light campfires with flint and steel. However, using a shovel on a lit campfire extinguishes it in adventure mode, therefore introducing an inconsistency.
Steps to Reproduce:
Place down a campfire and obtain a shovel.
Switch to adventure mode and use the shovel on the campfire.
Observe if the campfire is extinguished.
Observed Behavior:
You can extinguish campfires with shovels in adventure mode.
Expected Behavior:
You would not be able to extinguish campfires with shovels in adventure mode.