Not the first time I've heard that. A friend of mine here got a picture of a big buck, then never again. They placed a Wildlife Eye out and pointed it at the camera. The big buck walked toward the camera and then looped around it avoiding the flash, noise, whatever and continued on his business. Had they not set the Wildlife Eye out, they'd not known the buck was still doing what it was doing. Interesting.
I also have a set of two pictures, the first pic and 8 point was calm, the second he was reared up on his back legs like he was turning inside out. Some spook, some don't.