I can't speak for anyone else but for me the main reason is to try and keep things a little quieter... most of the places I have to hunt are far enough from roads and houses that it's legal to hunt but still close enough to probably scare the hell out of the folks in said houses early in the morning. In my opinion shooting suppressed does make a considerable difference in how loud the shot is eventhough it's far from being "silenced"I don't understand suppressed?
If i had my own property to hunt on i wouldn't worry about it at all.