Imagine you have a tourist visa. You come & visit & go home, always lawfully.  CBP decides they don't like your pattern of travel. They take you to secondary for interrogation.  They ask you whether you own a home, a car in your country. Who is your employer? Imagine you live in a country where renting is the norm & no need to own a car because public transport works well. You are a freelancer or self employed.  CBP hears this as no assets, no ties and no job. You must be an intending immigrant. They revoke your visa ON THE SPOT. You are now here w/o legal papers. You ask to speak to your family, an attorney or your consul. You have no right to counsel. They strip search you. They take you to a federal jail.  After your gone, they call your consul but it's too late because you are gone. They DEPORT you the next day. You are banned for 5 years because they couldn't be bothered to get you an interpreter.  This is not an isolated incident.  I am an immigration attorney.