One of my pet peeves: automobile owners who live in my town, yet drive around with out-of-state (and often expired) license plates. Nothing steams me more! We pay astronomical car registration fees in California, part of which go to maintain the vast amount of roadways in the state, many of which are badly in need of repair. According to California statute, these scofflaws are supposed to register for new license plates within two weeks of deciding to live in the state. We had one neighbor in Silver Lake who maintained a Nevada plate on his truck for over ten years - a state with unbelievably low auto registration fees. I have seen a woman park in my workplace garage every day for the past five years with expired North Carolina plates! As a public service, I hereby post noted lawbreakers on the Internets:

The old dude driving this truck has plates from Connecticut that expired three years ago.

This one from Texas has had the month and date stickers completely removed.

And this kid is driving a car registered in Guam. That's right, I said Guam!