Kvuo is correct. The most annoying thing about inability to turn sounds down is real life. I love the immersion of feeling like the conditions in the game are near to accurate. The problem occurs when my computer vehicle is making so much noise that I can't hear the phone ring, wife ack, or my daughter asking me for money.
On second thought.......
The truth is that, engines roaring and machines creaking and clanking about, while listening out for vox clues or any resemblance of an actual real life outside of the game would drive me bat puke crazy. Personally, I like to hear what my own vehicle is doing (running, bogged down, accelerating, etc.). Past that, I find that I need to turn my engine off to gain any advantage from audio clues other than actual gun fire. All that, and I can still hear DES screaming in my ear
-1 Even though I agree with the merit of your point of view, you
are able to adjust your own sounds as loud as you would like. Try not to worry as much about how others play, they will always find ways to dissapoint you.
