I have put in new anti-spam measures to reduce spam registrations. It seems to be working, as there haven't been any since making the change.
From now on, a new registrant will have to answer one of three questions, submitted at random.
The questions are:
1. What is your favorite car?
2. What was the first model year for Fiero?
3. Which GM division made Fieros?
Any bona-fide Fiero enthusiast should be able to give the correct answer to any of them. A spam robot, on the other hand, won't have a clue.