You guys should add the ability to modify the channels even more. Such as vehicle, group, side, and global chat being dependent on whether or not the user has or is using a certain item. This item can be anything that the mission maker specifies. Let's say, for example you do not have a radio. You would only have access to direct chat. If you have a radio, you could be given access to certain channels. Vehicle chat should only show up when in a vehicle.
Making channels dependent upon another object could make for some really cool and interesting scripts or addons.
Imagine in DayZ if you found a ham radio, you could be given access to certain channels, where you could then talk to other users.