QuietCombat will dis-allow the use of the reply keys whilst in combat. And also auto-reply when players whisper you whilst in combat or fishing.
It's for when players sometimes accidentally hit the reply key in combat.
To use QuietCombat, rebind your reply keys to the QuietCombat versions in your key bindings UI. You can also type "/quietcombat help" to show a list of QuietCombat commands.

