Yes, I've used mine in full sight of elk and walked (sometimes ran) towards two bulls that were fighting while herd of cows stood there watching me (and the bulls). The two big bulls were fighting and I was trying to get close. I was just about in position to shoot one of them and the bigger of the two just drove the other guy over the edge of a draw and down into a gully. I mean he drove him like a locomotive when he decided enough was enough. One of the most exciting sights I've been privleged to see in the woods.
Oh, I'm sure the big guys were distracted while fighting, which helped me get close. But, after I dropped the decoy with my mouth hanging open at the sheer power of a bull elk, the cows noticed I wasn't one of them and spooked off. I also thought that maybe it wasn't such a good idea to have been standing out in the open without a tree to hide behind!
ET