Basically, some of the rotating NPCs would "shroud up" and would be visible as "An average well-dressed chica" instead of their name. Through actions or response to dialogue this could fall, but they would re-apply later and become disguised as others are.
Contacts and wigs are moderately expensive for a consumable, and are apparently a bit easy to spot oocly (not 100% on this, still playing with them). It would be cool if Gold and Green had a mix of random people in them running around to provide cover for hoodrat shit. There would be more demand and use of the items this way. This would make it harder for PC's in these zones to accidentally/intentionally meta a disguise, and would encourage more interplay between the areas as well.