Because of a bug the antiflood module for „Mumble Moderator“ did work when a user was in the „exclude_from_antiflood“ group and spammed anything that were not mute/deaf state changes.
This is now fixed in the latest update.
On my server I use this exclude group for our Mumble-Ruby-Pluginbot musicbots; when they reply to the .songlist command they can become very spammy.
Additionally the Antiflood module now limits the following state changes:
The howto for installing the module and the module description can be found in my wiki, see here.