No doubt it works.

HUNTING (i.e. shooting/killing) pressure is what deters deer movement. Deer will become accustomed to human activity as long as they don't feel threatened. The deer at my Camp are proof of that. There is usually 1 to 5 out there at any given time. They hardly look up when you crank your truck. BUT, walk up on them out in the woods and watch what happens!!! They tear out like a bunch of raped-apes!