Of course, a place I worked last year in Florida had the air conditioner units stolen off the roof!!!!

But the point is, mostly, if you leave little expensive items on your cycle in the city overnight, there's a very good chance they'll be gone tomorrow. Extremists even take off their seats and front wheels! The only way to reasonably MANDATE presence of security devices is to have them built in. BUT, cycling is the transportation for those too poor to own motorised vehicles. So to make more expensive cycles in order that they have more similar safety features to cars IS counterproductive.

Cycling is safe, cycling is cheap, cycling is health promoting. Our societies should instead be working on REMOVING privileges from motorists and INCREASING privileges to cyclists. We are unfortunately headed the opposite direction.