This is very cleverly done with an explicit contrasting scene that is presented to us. Initially, when the hangings begin, the townspeople are shown to greatly enjoy and take pleasure in the hanging of the various n'er-do-wells of society that have been accused of witchery and hang for their supposed crimes. In particular, the film gives us an excellent close-up of Abigail exulting in the power that she has of sending people to be hung.
However, as time goes on, and more and more important people who are not outcasts of society are accused and refuse to recant, the hanging scene changes. The final hanging scene that is presented to us before the final act shows the townspeople grim-faced and sad as they watch their fellow members being hung. Clearly they are worrying about what could happen to them if their former friends and neighbours are being accused of witchery and being executed as a result. Their disenchantment with the hanging is therefore shown in the film through their initial enthusiasm followed by their increasing concern and worry and disapproval of what is happening as they watch their friends and fellow townspeople being hung.