I have observed in Texas as well as most other southern states that permanet blinds
are not ignored by the resident game animals, especially deer.
The first thing that the deer will do when he steps out into view of the blind is look at it
and they will continue to occasionally take a look at it as they feed. They know its there, they know there is something dangerous about it since "after that big noise that made us all get the h$% out of there, ole buddy Fred, with the big horns, ant been seen."
But, it hasn't done them any harm so they just keep a casual watch on it.