You perform a double slit experiment, detecting the photons at the slit, and storing, but not observing, that data on a memory stick. The pattern on the screen is also stored, but not observed. Person A travels with the memory stick to New Zealand and person B travels to London with the unobserved screen. Person A then decides wheter to destroy the memory stick or to observe its data. Person B then, as simultaneously as possible, observes the screen. As I understand it, as long as the memory stick still exists out there, observed yet or not, person B will see a particle pattern on the screen. But if person A destroys the data, person B will see an interference pattern. I suppose that when A makes his choice, B would instantly be able to see what that choice was when he observes the screen, no matter if the information about A:s choice has had time to reach B? In that case there is a convenient way for us to transfer information faster than the speed of light, and we could start sending binary data instantly in this way over endless distances?