The most important paragraph in Corey Doctorow’s essay:

No, the worst part is that, like the lady who had to swallow the bird to catch the spider that she’d swallowed to catch the fly, any technical system that stops you from being the master of your computer must be accompanied by laws that criminalize information about its weaknesses. In the age of Google, it simply won’t do to have “uninstall HAL9000.exe” return a list of videos explaining how to jailbreak your gadgets, just as videos that explain how to jailbreak your iPhone today could technically be illegal; making and posting them could potentially put their producers (and the sites that host them) at risk of prosecution.