Anti-circumvention laws are not the same thing as copyright. Not in the least. And it's very debatable that copyright should be used for tractors, for example.

Anti-circumvention laws are not the same thing as copyright. Not in the least. And it's very debatable that copyright should be used for tractors, for example. If you invent a new engine you can patent it. But if you make an engine that works like any other engine, why should society help you prevent your customers from tinkering with it?