First there was child audio surveillance - now there is Visual Surveillance too

Voice surveillance is a feature of child tracking devices that has recently been discussed at childtracking.org.  Now it seems that technology is taking the next logical step with Visual Surveillance being added to the list of features. Researchers at the University of Tsukuba have created a new child tracking device that will also allow parents to remotely see what their child is viewing.  In addition to existing child tracking device features, it will also monitor their pulse. When the child's heart rate is faster than usual, an instant photo is taken from the child's  point-of-view.  The parent is then alerted to access an activity log on a website where they can see photos taken during the day. So, is this a step too far?  Is it a feature you would welcome, or could it be misused by paedophiles.  Would you be happy knowing that other children in your child's school was wearing such a device?