The setting doesn't appear to entirely work either... I've had servants standing around a table when it went off before, it still seems to affect them even if I've forbidden them to use it using that setting. I guess what it does is stops them from walking over to the Prop & interacting with it directly, but that setting doesn't seem to affect Props that have an AoE buff/debuff that gets applied just being near it with a recurring refresh rate (doesn't look like the toggle to disable it works either).