I think you may have heard this before but, What are you afraid of, actually calling one in?
Since you asked.....
I'm afraid of alerting a perfectly calm whitetail that may come by me as to my whereabouts.....or "something's" whereabouts. For every deer you tell me you call in.....there could just as easily be that many (or 2X?, 3X, 4X???) or more who hear it and go the other way.
I'm talking about HERE....where I hunt. I wouldn't begin to think I know someone else's woods better than they do...so I won't speak for anywhere else.