Why would seeing more of the rigging at a time be a problem?...
Spill is a
waste if one already knows exactly WHAT one wants to look at and WHERE it is. Checking theatre rigging remotely is quite a bit different than
looking for an unconscious two year old in a canyon. In a remote rigging check with a light and binoculars (often viewing
each point from three or more different positions) it is very easy to think, "...jeeze, I wish I could squirt all this light I'm
wasting as spill into more throw
that could actually help me accomplish this task." (I have had that very thought while using a 2 degree beam.) This unwanted spill also makes it harder to see what the spot
is illuminating. It's a waste all around in many situations, not just theatre. The same is often true at sea, for example.
Complicating matters more, theatres often become very,
very frantic in the final week before a big show opens. There may be 4-5 crews trying to accomplish
vastly different tasks all working in the same space. The best among them will try really hard to have a minimal negative effect on the other disparate teams. As an example, a stage carpenter may find himself on stage putting the finishing touches on something while the lighting director is focusing lights. Time and again the carpenter may be virtually in the dark (except for his own light). He may even wear black clothing so that he will send less splash around the room
no matter what its source because some of these tasks require
as little ambient light as possible to make them even doable. People who may work in the same space with others while providing minimal distractions to those in their proximity are in greater demand and find more work than those who are more distracting.
So, here we may have a situation where time is short and everyone is on stage at once. The last of the scenic painters are trying to finish up along with the stage carpenters. The sound implimentation guys are running the last of their cables while the prop master is still setting up almost in the wings offstage right. The rigger is checking his points remotely and while all of this activity is going on in the
same place and at the
same time the lighting director needs it all
as dark as possible for the focus.
In technical theatre, cooperation is essential and disruptive crew members will waste a lot of time
that no one has. The riggers will probably have the most powerful, potentially distracting lights
of all the crews on stage so they have to be very careful how they select and use them
if they want to keep their jobs.