In California, some parents are forking over $99 dollars to a company that employs off-duty or retired police officers so that they can have someone following their kids. The parents are concerned that their kids will be texting or talking on the phone while behind the wheel, or driving dangerously.

The teens apparently know they will be followed at some point, but not the specific time of when it will occur. One father who used the service called it a "win-win" for he and his daughter, as it confirmed for him that she was being responsible.

The company also points out that the leading cause of death for U.S. teens is car accidents.

So are the parents going too far out of a fear for their kids' safety?

Shepard Smith talked to Judge Andrew Napolitano on Studio B about the constitutionality of this practice and the two discussed whether it's another indication that Americans are becoming increasingly comfortable with being spied on.

"[The cops] may be off duty, they may be out of uniform. They still have a government-issued badge, a government-issued gun. They're still cops. They are still using the power of the government - the badge and the gun and the equipment that also accompanies that - to spy on somebody. [...] Children have constitutional rights like the rest of us. So this is a serious violation of the Fourth Amendment right of the person spied on, whether it's my grandmother or my nephew," said Napolitano.

Smith pointed out that spying in America seems to be "all the rage," and becoming more and more commonplace.

Napolitano answered by pointing out that, "It starts with the federal government saying 'if we don't spy on you, we can't keep you safe,' and then it makes its way down."

Watch the full discussion: