When transiting an international border in the US, visa status information is available to CBP along with a quick perusal of the person's social media (EU state

When transiting an international border in the US, visa status information is available to CBP along with a quick perusal of the person's social media (EU states do the same if not in a VWP program). Her social media has shown she was working as a tattoo artist on tour in LA with dates - direct violation of the VWP because it's an employment role.