But what kinda' crazy shotgun shells are people using for you to be far enough away to be confused for a bird yet close enough to be shot at?
It is more a function of the sheer amount of people hunting some public lands now.
Opening day in TN last year I had a bird roosted. He flew down across a river onto private. Heard another gobbling on up the river so took after him. I set up about ~50 yards from the property line. I hear someone start calling behind me to my left. The gobbler is working his way in kind of between us. I'm just waiting for him to cross the property line when BOOM, BOOM! The guy to my left took 70+ yard shots at the bird while he was still on private. Of course he missed. Looking back, I should have just risked spooking the bird to let the guy know I was there (Even though he heard me calling, may have thought I was a hen).
Next incident was 2nd day of LBL season. Once again, had a bird roosted. He flies down just out of range and about that time someone starts yapping way off behind me. I got a bearing of the bird and made a big circle to try to cut him off. (Opposite direction of the yapper). I'm easing along, scratching, clucking every now and then. As I crest a hill, I spot a hen decoy at 20 yards. I immediately yell "DON'T SHOOT!" and throw my arms up. Look to my right and there is a shotgun being lowered, it was aimed right at me. I asked the guy if he thought I was a turkey and he just said "yep". Ugh. Doesn't matter what load he was shooting that close. Guy was super nice and had parked before he got to my vehicle so he didn't see it (I believe him). Once I got out to the road, I noticed a 2nd truck had parked about 100 yards behind the guy i'd just talked to's truck! So effectively, four of us were on the same bird.
I'd always wanted to hunt LBL and see if it lived up to the 'googan' expectation. It did. LOL. I have zero desire to ever go back.