There is something specifically that they're looking for, but it's not on your device. It's your reaction. It's your non-compliance as an excuse to discrimina

There is something specifically that they're looking for, but it's not on your device. It's your reaction. It's your non-compliance as an excuse to discriminate against you. They can't actually admit that they're discriminating against dark skinned people, or people they overheard making thoughtcrime comments while in line, but they can make intrusive demands and then bust your ass when you don't comply quickly or enthusiastically enough. "Papers please" was never really about the papers.