They were basically a secondary town. None of them knew each other and only 2 had real ways to confirm themselves eventually (Lind & Baki) until the census was created.
Had the census not been created there would have been the possibility for fake yellows.
Hell even with it all the yellows were positive Red Night and Indigo were yellow for like 5 days lol.
Had town (town + town 2) ever lost majority
@Lindltaylor would have gone full hostile take over mode and started culting green town into yellow town as he “saved” Azeroth by turning it into an undead frozen wasteland