I'm sharing this experience just to share, not suggesting or making any claims about what people should do with it:

One of the best ways to get through airport CBP quickly without being overly hassled is to be overtly, clearly sick in a gross way. If you're about to vomit or have horrible diarrhea, they do not want you in that line any longer than you have to be. If they're the type to want to take people down a peg, they won't bother with you because they're already miserable, and if they like picking on the weak, they're probably going to go for a solo young female traveler who isn't ill.

Nobody wants to risk getting vomit on their clothes or in their work area, having to close a line and shuffle people around while their coworkers glare daggers, or subject themselves or their coworkers to the very fun smells of human bodily fluids.

At the same time, it isn't purposeful so it's not read as malicious.