It's really easy to avoid unintended expletives in your auto-generated alpha-numeric fields.
You just need to n_t _s_ v_w_ls!
Our number-plates use the format 3xConsonant 3xDigit 2xAlpha_for_the_province. For some personalised number-plates its digits first, consonants second.
Of course, they forgot that 'Y' is a vowel in Afrikaans, and some clever bggrs chose plates like "160 RGY".
You can't keep a good smutty mind down...