Someone here made a good point....ya take any thinking out of the equation and make it strictly motion based....if it moves shoot...sentry guns/mine fields....then there is no room for error...if you go there you die...known to all.

Totally useless device.
Any sniper can disable its sensors at once. :down:

It is like the sensors at the south US border, the mexicans damage them at a bigger rate than they can be repaired.