I have used many of them. I understand exactly what is possible. Where I take issue is the fact that you believe an employer is presumptively entitled to retrieve, duplicate and store an employees personal device. If the employer provides the device or substantially contributes to cost of maintenance, fine. There's no expectation of privacy. I'd argue that there needs to be grounds before a court would allow an employer to violate an employee's right to privacy based on a contract of adhesion. And just because an employer has gotten away with it doesn't mean it's legal.