Not rarely, if person don't have good reason for gaining entry into U.S. or if you studdle during questioning, custom can bar the person from entering U.S.
The record shows up when they swipe the passport into the computer. It's everytime for airline passengers and if you carry visas that needs stamping from the office (not custom booth), but for vehicles passengers, its random basis not often.
From what I understand, it's the norm to bar person with record or unemployed. U.S. custom's premise, you are guilt until proven innocent when it comes to gaining entry into their country. U.S. custom targets single woman or women that dress like in the biz and refused entry if suspusion she/they may work in U.S. I've seen it several times to girls ahead of me in the custom line-up. One time several foreign girls grab me in the line-up and asked me to their 'boyfriend-of-convenience'. One of my ex (not in the biz) didn't have a record but targeted everytime as she liked to dress flashy and few times the custom guys was oblivously being a prick, so to talk to her for a close-up.