Are you trying to tell me that the birds get call shy? Or mouth call shy?
And are you saying that mouth calls put you at a greater risk for a hunting accident? Seems to me like the guy who taught me how to mouth call knows a think or two about turkey hunting safety, seeing as how he has written a book on it, wrote the 10 safety tips for turk hunters in the ODNR reg book...and still carries 17 pellets from another hunter's gun - and he taught me how to box call, slate call, mouth call...just not to use a gobbler tube during season!