Your example of a law that would force Apple to allow Blackberry to write its own iMessage client would open two major problems: - companies like Twitter w

Your example of a law that would force Apple to allow Blackberry to write its own iMessage client would open two major problems: - companies like Twitter would be forced to allow 3rd-parties to write clients, and could kill Twitter's sources of revenue - Blackberry could write an insecure client & harm Apple customers In general, open APIs and third-party development is a great thing. But to require it? That's extreme. Besides, isn't proprietary technology an excellent way to differentiate product offerings? Why must it be accessible on competing platforms and thus invalidate my differentiating value?