Honestly, good for them for doing what they can against human trafficking. It’s worth offending a person here and there to save people from that terrible fate. Unfortunately, differing skin tones/ethnicities are probably the easiest indicator of human trafficking to watch for.
Edit: I assume race isn’t the only thing they consider. If it is the only criteria necessary to confront someone, that’s obviously a problem.
Edit 2: I’m sick and my brain isn’t working right. Maybe I am just being stupid – it wouldn’t be the first time.