Earlier quoted context omitted.
Curious...is your wife from a country that is not on good relations with USA? Have you traveled to the likes of Iran, Syria etc? Do you think your name has the equivalent of an asterik next to it? They have so many people to process that unless you "piss them off" (as judged by them) and you are a US citizen with all docs in order they don't usually pick on people.
She is from China, hence all of my trips there. I don’t think I set off any red flags. I know they don’t usually pick on people, and haven’t picked on me or my family aside from that one incident, but the odds of being picked on by USCIS are way higher than the odds of being picked on by Chinese police as a foreign tourist.
Chinese police...well, I mean, there is crap you have to put up with as a foreigner. Finding the right amount of paper work to register at the local PSB (and sometimes needing to drag your landlord along), and having to re-register after a foreign trip. Then the random checks when they come to your apartment to check your paper work... Chinese police aren’t bad by any means, but if you are a foreigner living in China, there will be some friction.