I follow Kenlowt on this one.
However, I suppose you could source the feeds into the MMO and Aviom from groups and just mute the appropriate groups, either through a physical controller (i.e. desk), through the iLive software, or as Martijn says, through a PL10 or 6 …
It is, by extension, actually something we’re thinking about, as we have people plugging into our system, but without an engineer standing at a physical desk, it’s hard to cut the mains quickly enough to stop stupid plug-in acts; I have taken to putting a very hard limiter on anyone plugging into our system.
http://www.pianojam.nl