My suggestion is to introduce disableChannelsVON[]={} setting in description.ext by analogy with disableChannels[]={} to disable VON only. This feature will be extremely useful for public servers that host missions with multiple sides. People usually abuse global chat or use it to talk with one person while entire server hears them. Many and many servers at the moment have a rule which doesn't let players speak in global but of course if admins aren't online people will abuse it. This feature will be a great help for administrators of many kinds of servers all around the ArmA 2. Attached screenshot is example of how player will be told that they are not allowed to use voice chat in certain channel.