I've had similar problems with mine.
Yeah...My wife got mine for my birthday. I wanted something that would politely refer to the fact that I'm black....and a U2 fan. So I went for U2BROTHR. When my wife had to complete the form, it stated clearly that license plates cannot be religious, racist, sexist, or inappropriate in anyway. So she filled out the form stating that U2 was the band....and "Brother" meaning a friend of the band. So I guess I got away with one there. Any mention of race would not be allowed.
The kicker was....I'd drive around Toronto and folks would yell out "Yeah man....or hell ya!" to me. Found out that a lot of people think "U2BROTHR" means "up yours"....or "Fuck you"....or "You as well!"
My wife suggested that I help clarify it a bit so I have an Achtung Baby decal on the rear window.
Worst ever....while in Raleigh.....while wearing the license plate around my neck......an American security guard at the stadium said,
"ONTARIO.......what state is that?!?!?"