this is brilliant!!!
(explanation for non-computer people: the common excuse for bad programming is to say “it’s not a bug, it’s a feature”)
Nissan 300ZX - ZEXXXY.
White VW Beetle - MRSHMLO
I always thought it would be funny to get an old Pinto and paint hot-rod style flames on it, coming off the back instead of the front.
One I saw in L.A. once read “UPPA US”
Say it with an Italian accent: “Hey Tony! Stick it uppa u.s.!”
This was in the mid '90’s, but it was the old '70’s blue and yellow CA plates, so it must’ve escaped the censors for a long time.
I have heard, but not seen, of a black VW Rabbit with the plate ENLI.
And the IFLS page posted a picture of a white Nissan Cube with the plate C6H12O6.
[spoiler]That’s the chemical formula for glucose.
It’s a sugar Cube[/spoiler]
This plate from New Hampshire is my favorite:
I learned my first pun on that TV show!
RKTECT
variety of car didn’t matter (or at least, wasn’t remembered)
On a musicologist’s car:
They need to scratch out the ‘Live Free Or’ part. 
Someone I know of who was a referee for soccer had
C LAW 5
I’ll see you and raise you:
A EDITOR
My guess is that the car is owned by a couple, PSK ‘n’ TDS.
Exactly what I thought when I first saw it… I had a friend that had a similar tag. Her initials and his. She and her fiancé owned the vehicle together.
Like it! I knew a teacher that had PERFEKT…