I think I would build on earlier comments. I think this is about reducing friction. Many governments around the world build their open data policies on the freedom of information legislation or access to information legislation that they have in place. I think this issue is really about reducing friction and making access more available.
If you can publish the data and make it consumable and easily available, then you should do that and not hide it behind a lot of bureaucracy that may be unnecessary in a particular case. That's not necessarily always the case, of course, but I think you should reduce friction where you can, and that encourages people to publish. It encourages citizens to consume.
The other thing I would say to finish is that it's important to understand that open data is not WikiLeaks. These are separate things, so I think it's important to make that distinction as well.