Diff in state laws driving laws can be interesting, indeed. That one is more different than I expected, but still basically the same.
Anyhow... I always thought the cheesiest movie "monster" was the Invisible Man. I never gave it any thought when I was a kit, he was just invisible, and that was cool! But, really... to be invisible, he also has to be naked. And that's just funny!
Okay, since we're on the topic of driving, and that's my job...
If you are teaching, have taught, or would ever teach someone to drive... would you take the time to read your state's driver's handbook first? And if you KNEW you had bad habits that could be improved upon, would you consider taking a driving lesson or two to help you identify and correct your bad habits BEFORE teaching them to someone else? (Asking for 100 million friends... soooo many children learning bad habits and wrong information from their parents, and the parents have NO inclination to learn or improve themselves. A parent could take a few lessons, teach their child better, and then the child would need fewer, or possibly NO lessons. But, nobody ever thinks to do it that way.)