"Name": "LevelDrainAddict", "BaseLevel": "0", "Type": "Addiction", "CreationOn": "Not in use yet other than for tracking", "CreationOff": ""
I found this in the addictionList.json. So it's likely a planned feature, but not implemented yet
Edit: Digging through the event, the addiction score is already being set by the level drain scenes. Looks like you gain 3 addiction per level drained. But that score isn't being used for anything right now.