The Vindicator does not despawn on peaceful difficulty and still attacks players, villagers, and iron golems.

The Vindicator mob for some reason will not despawn if the difficulty is set to “Peaceful.” I don’t know if this was intentional, but this makes the game a whole lot less “Peaceful.” In the screenshot, it shows a Vindicator still standing there, not depawning. The other screenshot shows the Vindicator is still very much aggressive.