Same question. AFAIK in the first-world countries I've flown into the line you're put in depends entirely on the passport you hold, and sometimes traveler-speci

Same question. AFAIK in the first-world countries I've flown into the line you're put in depends entirely on the passport you hold, and sometimes traveler-specific preregistration programs (e.g. Global Entry in the USA). Are you actually helping people skip lines, or just showing them the right ones to stand in?