Here's some indisputable evidence of spooking deer with an IR trail camera. You can't tell me the regular flash camera's are any better. All deer are different. Like Ed said I've had many deer form a new trail around my camera's to avoid them. Whether It's the IR lights (tiny red lights blinking), scent, seeing It, noise, some deer do spook.
http://s241.photobucket.com/albums/ff319/scsmilkman/Nice%208/?action=view&current=2ndtrailNEcorner2008001.f lv
