Should an Officer wear a Driver's Badge that was earned while he was Enlisted?

No. Just no. Officers should not wear a Driver's Badge. Ever. I do not wear bolo badges either even though I qualify expert every time. Ribbons and decorations are different.

Can you? Yes. Should you? No, especially if you're a lieutenant (just trying to save you some grief ladies and gents...). I guarantee you some senior officer (Commander) will tell you to take that stuff off at some point in your career, sooner than later.

If you insist on wearing badges for driving or marksmanship, make sure you qualify the same in every badge so you can have a ladder with about ten things you qualified on. It's better than showing how inconsistent you are and you will look more impressive. Honest.

You earned it you wear it, if it's in your SRB you wear it.

What is a drivers badge ?

If you earned it, wear it !!!

If this were my situation I would not wear it.

Of course he/she should. If it’s earned it should be worn.

If earned, should be worn with pride, like a previously enlisted wearing a good conduct medal. It was earned!

If you earned it and awarded..... Then wear.

I NEVER GOT NO STINKIN BADGES FOR BEING A DRIVER ??? THATS LIKE GETTING A DIPLOMA FOR GRADUATING KINDERGARDEN ???

No idea what a driver badge, if you earned it wear it.