There's no way he could see me for the brush on that setup. I've had a bunch of birds spook off decoys over the years. I learned long ago that you were better off without them in high pressure areas, they'll actually come closer without them and hang up less often. What many folks don't realize is a tom can pin point the location of a call with amazing accuracy. There are situations they work well, but there are many situations when they are useless and actually hurt your odds tremendously.
Even though one of the area I hunt is a private land, it's surround by public on 3 sides. I've never seen it happen, but I also thing there is a fair amount of poaching from the road going on as the turkeys don't like when cars even slow down. They bolt.
One of the areas I set up on, is at the bottom of a huge oak ridge. There is a swamp to the south of it, private land to the east that I don't have permission to hunt, and a hay field to the west. I have to cross the hayfield to set up, or come off the road to the north. Coming from the north, scares birds, I've done it.
If I come in under total darkness, and sneak along the swamp edge, I can get close. 100 yds or less.
I softly yep once things have settled down and if I get an answer from him, I shut up. They seem to know EXACTLY where I am. It may take a bit after flydown, but they do come in if I do my part and sit still.