This doesn't work like this. Braingate (and all brain implants of this nature) require very active effort/cooperation in order to produce output. Here's what it feels like:

- Imagine, very hard, the act of moving your arm to write a message.

- Do everything that you would do to speak a word, except the actual act of articulating a word. Get as close as you can while stopping the actual muscles involved from firing.

These are not mind-readers. They hook into your normal brain circuitry. It mostly works the same way that you can type out a message on your keyboard without thinking about the keyboard: it's a brain HCI, `/dev/input`, not kernel-space.