I've gotten the chance to play with that new $350 device, one of the other people nearby wondered what it could possibly be good for.
"Well," I said, "there's the pictures of the house on the box, good for checking for leaks, and also you can use it to see how 'into' you someone is."
"Huh?" they replied.
"Well, any areas of your body receiving extra blood flow will get warmer as a result."
"Oh. Oh! Ohhhhhhh..."
Anyhow, defeating this method is trivially easy. Use the attached signature pen (or other stylus) to depress the buttons. Easy.
--Patrick