My daughter does this all the time on my Kindle Fire and my WP7. She routinely has her thumb just sitting on the edge of the screen and she wonders why the game

My daughter does this all the time on my Kindle Fire and my WP7. She routinely has her thumb just sitting on the edge of the screen and she wonders why the game won't work for her, but works for me. You could program dead zones on the edges of the device in applications you develop, but that doesn't work for other apps.