Speeding Ticket Avoidance
This is a very popular security-related field, and one that every driver is at least somewhat interested in.
This site is run by an ex-policeman, and feels authoritative. He places a lot of emphasis on education; installing a fancy radar detector isn’t doing to do much for you unless you know how to use it correctly.
This spray claims to make your license plate invisible to cameras. I have no idea if it works.
One final note: the ex-cop is offering a $5,000 reward for the first person who can point him to a passive laser jammer that works.