Loco, now you may be on to something. What scares deer, is anything they're not used to. Deer who live near subdivisions, hear traffic, kids playing, dogs barking, and smell humans constantly. They are not pressured, that's why they're easier to kill. You take a deer that lives in a remote area, and all of a sudden, hunting season starts, and they hear strange noises and smell strange smells, well it freaks them out.