Let's say a bike would normally last you ten years, but it gets stolen every two. Each time you buy a new one. Therefore, there are now five as many bikes as needed. But then, why isn't the market saturated? How can it sustain such a high churn rate? It seems to me that bike thieves need a way to get bikes out of the market, too. They can do it in two ways: by hoarding bikes (http://i5.photobucket.com/albums/y171/FORDSVTPARTS/Bikes/bik...) or by destroying them. Couldn't something be done about that side of the equation? Reporting people who have abnormal numbers of bikes, or who sell hundreds of old bikes for scraps?