5) Bad guy technology: Simple yet effective. Most communication is by cell and satellite phones, and also by email on laptops. They use handheld GPS units for navigation and "Google earth" for overhead views of our positions. Their weapons are good, if not fancy, and prevalent.
and WHY can't this be jammed/blocked?
Because it is the source of information. By allowing them to have access to it, we can just listen in and read their mail and they are exposing themselves with every call and keystroke.