I decided to un-mute my entire must list as I'm creating a false version of this community. It took a while. Rather than muting 1-by-1, which takes a while (courtesy of the "[i]Patience is a virtue! Please wait a moment before performing this action again[/i]" message if you try to un-mute faster than 2 users per second), it would be easier to have checkboxes and an 'Apply' button that goes through each user that was checked and un-mutes them.