Once again, he sees them smiling and then he sees them walking away down a street where yellow lights scatter and regroup sporadically, withoutany obvious pattern, although Henric knows deep down that everything is determined in some way, everything is causally linked to something else, and human nature leaves very little room for the truly gratuitous.
One can argue that multiple pages can weaken your position, but this is not how things work in Facebook: users jump from one page to another withoutany specific discovery pattern in mind (if you look for a scientific word to describe this behavior and impress your colleagues, try serendipity).
After intercepting the key, she can make it record just the right pattern of bits withoutany of the telltale errors her eavesdropping was supposed to introduce.