Perhaps Espinal is unaware that labor law already prohibits employers from requiring employees to conduct work-related activity when they are off-duty.
Prohibiting employers from contacting employees during off hours is a terrible idea. There are cases in which the employer has a legitimate interest in off-duty communication. For example, if a natural disaster hits, the employer has a legitimate interest in finding out if the employee is affected.
The article is not clear about what, exactly, Espinal is proposing. In any case, he should study up on existing law and make an effort to understand employer/employee relationships.
At my place of employment, we have contact information on every employee, contractor, and student who spends even a couple of weeks with us. And we have contacted employees who are on vacation on certain occasions (like natural disasters).
“labor law already prohibits employers from requiring employees to conduct work-related activity when they are off-duty”
Maybe for some, but certainly not for most salaried jobs - never off duty.