I too feel like the insanely loud pipes are hurting us but really, it doesn't matter how whisper quiet our machines are we will still be attacked by the extreme greenies who want the trees and squirrels for themselves, not to be intruded upon by anyone else' favorite way to recreate and see the countryside.
I was in one of my favorite riding areas a while back (not a groomed area but back country) eating lunch with all my riding buddies with ALL the machines turned off for over an hour.
4 "Skinny Skiers" came down the hill and scowled at the whole group just for being there and leaving tracks in "Their" snow.
Noise had nothing to do with their pre-conceived opinion of our sport.
My sled has the quieter version of "The Thing" can and is only mildly louder and throatier than stock.
I LOVE the way it sounds and is by no means obnoxious,
I'm an old guy who still loves to get out and play on high horsepower machines and I have an appreciation for a well tuned racy sound from my motor whether it's my Chevelle or my sled.
My wife's sled sounds like a sewing machine...Good for her, but not for me.
Keep them quiet in the staging areas and while passing the skiers...idle speed is quiet and won't make us all look like a pack of crazed lunatics out to destroy the tiny woodland creatures.
Use your heads for Christ sake.