A workmate of mine a few years ago was very proud of having gotten YOMOFO past the fun police, it was fitted to a rod based on a late 30's Ford and he told them that he'd have gone FOMOCO but it was taken so he'd settled with YOMOFO.
He'd lived in LA for about a decade, I don't think he realised how obscure it still was here to call someone a MoFo if you were calling them a motherf**<rudeword>.
Segueing onto the "why spend the money?" topic, I mustard mitt, I do recall back when all personalised plates were a one-off fee, so the current concept of paying for them annually is a bit of an anathema to me. But then I'm still paying full rego for the European project car partially because the historic/modded-historic plates look dumb compared to the Euro style ones on it, so how can I talk?