This has been asked for on numerous occasions.
Recently I've been turning the in game playback volume right down so i can't hear people on range. Obviously squelch works great but there have been far too many times recently where i've had to do 1,2,3 guys all at once and them to be back the very next sortie after logging in and out.
Please if its not too much trouble
Other games remembered the mute function of particular game ID's so it isnt impossible.
Bruv
~S~