Does it seem unlikely that technology allows people to know what you are thinking by monitoring your subvocal electronic patterns. It seems that when we are hearing someone talk or simply thinking to ourselves that the brain still sends the electronic message to our vocal cords as if we were going to say it out loud. Some people do this more than others. You may notice some people even mouthing the words as they read a book.
This seems like something from a Sci-Fi movie but the fact is this technology was in use and already developed in 2004 as shown by this NASA press release stating this fact.