I think it all depends on the area where the deer live. If the deer are used to seeing people and wierd people objects. This is my first year using my stealth cam prowler adn i havnt had one deer run from my infared camera. i am in a very people populated area though they may be used to seeing different obnject and not be scared of them. even my mature bucks dont have a problem
http://www.youtube.com/watch?v=I0_lzH9sKrI