This whole thing has to be some kind of joke... someone writing a weblog in their spare time to screw with people on the Internet. Seriously. The scrapbook is normal until the end; it's like she took a course on storytelling or something... what, with the foreshadowing in the earlier entries.
And she knows a bit about computers, too... I don't understand how someone with her credentials and knowledge could come to the conclusion she has. That's also why I think this is a farce of some kind.
Perhaps we should encourage her to build a Faraday cage? It's really quite simple; just build a frame and wrap it with copper mesh... go inside, and you literally have zero radio waves of any kind. No cell phone signal, no wireless signal, nothing.
She should open a brand new computer in there, format its drive, install Windows, and look through all the files. I bet she'll see this "suspicious" activity then, too, and she can rule out radio waves. So maybe she'll come to the conclusion that she's f'ing wrong...