"187 PIG"
Someone in my state had that until some asshole called the highway dept. and told them what it meant. A highway patrol officer that gave a lecture in one of my classes when I was in high school told us about it.
One of my friends has "GTMEOFF" on his plates. He had to argue with some woman from the highway dept. over the phone for an hour before they would approve it. He said it was because his car was a GT.
He drives a 300zx...
"B8BB8B8" My very own idea. Kinda hard for ppl to read
when you are speeding away from them. Could be useful.