New Jersey residents have many reasons to be happy:

The state has more diners than any place on the planet.

Despite the oft-reported heft of its governor, New Jersey remains one of the skinniest states in the union.

And of course, Jersey Shore has finally been cancelled.

But if you live in New Jersey, don't go smiling about all that when you're posing for your driver's license photo, or you'll have to do the whole thing over.

According to NJ.com, New Jersey recently instituted a policy that prohibits residents from grinning in their driver's license pics. That's not because the state wants drivers to look dour, as though they fully understand the solemn responsibility that comes with having a license.

No, it's because smiles any larger than the one shown on the sample license above can confuse facial recognition software.

Philly.com says that DMVs have begun using such software to catch driver's license applicants who might be assuming someone's identity to create a fake ID: "If a new photo, for example, matches an old one that carries a different name, a red flag goes up, and investigators step in."

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Over time, we have a hunch that policies like this will create a database of faces, just like the existing fingerprint database. Ultimately, law enforcement agents will be able to use that database to pick out perps from security camera footage after a crime has been committed.

Which may or may not be a reason to smile, depending on your point of view.