If you set your flash near any feeding stations that are "photo-cell" the game learns quick that when ever they move near the camera, the flash will signal that the feeder is going to go off.
I will post them shortly, but I have photos of a number of hogs, and deer deliberately setting off the flash to feed. It cost me about sixty dollars before I could correct the problem...LOL
So the moral of the story is, not to set them near photo cell feeders, change the spinner motor(which I did), or go IR...spooking is not a problem. Where you might want to choose IR is where you have people moving through the woods who might see the flash, and decide that they might want to take you camera. It happens......