A buddy had the personalized license plate "KLR-BEE on his 1970 Dodge Super Bee for years here in Missouri.

He went to renew it and it was denied, because it used what was seen as the word "Killer" which apparently was now objectionable by whom even does the approvals.
The fact that he had been using that for 20+ years meant nothing.

IIRC now his plate say "STUNG" which isn't nearly as cool as KLR-BEE on a yellow Super Bee.