I've been stopped 4 times in my life.
Twice for speeding, and I got a ticket both times.
On one of those occasions, I was threatened with arrest since it's apparently a misdemeanor in Florida to have another state's tag on the front of your car, even if it was registered to you in your prior state of residence.
In Florida, you only have to have FL tags on the back of your car. And yes, my Florida "papers" were in order when the jackboot threatened to arrest me.