Since there's no reason for them to need it, hide the snake box!
... then how would the musicians connect their instruments to it....? They have to interact with an XLR *SOMEWHERE* to get the audio to the mixer.
That being said, you would think that when the musicians are plugging in to or unplugging from the snake head, they're not live. Is there not a ROS that the sound technician can consult, and therefore know, "after this point, THESE instruments are done, and will be disconnecting their equipment," and (s)he can proactively mute those channels?
-Ray