I dont think HT Really wants to do this. At least as a squelch.
Range is great for coms with people in the area, for people you would not normal get to talk to on vox. Its there as a team thing.
Sometimes you can get in a fight or something and you really wish you could tune folks out. I understand that as well.
How bout this for a proposal.
How about a Timed Squelch on Channel 2. What I mean is this. You type .squelch 2 and Channel 2 is squelched for 3 minutes. once three minute elapse, Channel 2 is unsquelch automaticly.
I would program a button on my HOTAS for those moments when I need a clear Vox channel. Of Course you could abuse this by constantly squelching, But Its not much different than turning off your speakers.
Used properly, this would give you a chance to clear Range Vox, Yet a few moments later you would have all the benifts of Range again.
No Idea how hard it would be to impliment, but I figured Ideas are always good to toss around.