On the one hand, I know what it means to have to drive on expired plates. My sister had to for awhile because she couldn't afford to get them renewed. (Deadbeat husband, two kids to take care of. The kids' expenses came first, and by the time she was done getting the things she needed for her boys, she didn't have the money to get her plates renewed.)
On the other, the way this is written makes me lean toward you deserve it. How did you not know they were expired?
I'm torn. I guess I say FYL AND YDI because it sucks that you're going to have to pay all that money, but it is kind of silly that you didn't realize they were expired.