You must not live in SF then. After four fix-it tickets for no front plate, I caved.
i had a personalized license plate on the back that i no longer cared about and i discovered that when i told the dmv that i lost the front plate (which was true, since the car had no front plate for 6 years outside of chicago) they gave me a temporary plate while the replacements were being made, which cost me all of about $10.
the temporary plate expired in 6 months, so for 6 months i was able to avoid having a front plate. if i had kept the car for longer, i would have just told them the plates never came in the mail or something, paid the small replacement fee again, and gotten another 6 month temporary plate.