Shoppers diversity

The store I steadily shop at has a solid handful of “usual” shoppers and they are all foreign from another country. They tend to shout at each other in different languages. Some are working with two phones, others I see two people in the car going on delivery, then some husband and wife duos etc. are the folks legally working in the United States? Is it possible to get an account going without US documentation or could they be working schemes and doing the shopping and splitting the pay?