Rosas’ and others’ fears are not unfounded — authorities are already enforcing the law.

A Mexican man who arrived in Florida a year ago was arrested last month while returning from a work trip to Georgia. The Mexican consulate told the AP that the man was stopped by police for driving a van with window tints that appeared darker than the legal limit.

He was arrested and later charged with not having a valid driver’s license and multiple counts of smuggling “illegal individuals” into the state, according a Florida Highway Patrol report and court documents. A police report showed that six other people were in the vehicle with the man, including a minor.

The man’s arrest echoes the experience of another immigrant who spoke with the AP.

A 45-year-old Mexican man, who asked not be identified for fear of being deported, said a routine traffic stop in 2011 led to a monthlong detention and his later deportation for not having a driver’s license.

His wife was pregnant at the time and although he reunited with his family after crossing the border illegally five months later, he missed the birth of his second child.

After Florida’s law passed, he moved 1,500 miles (2,400 kilometers) northwest to Wisconsin with his wife and three children after the law passed. The move was worth it. He said he feels “comfortable, calm, more confident” in the Midwest state — a far cry from Florida, where he felt “anxious, pressured and afraid of any police.”

“I’m not going to leave my family alone,” he said. “I’ve been through that once.”