Nothing pisses me off more than hearing a stupid Stage Director squacking into the clearcom asking whether or not something looks the way it does or anything like that because they can't see shit from backstage.
For our last gig, to shut the annoying SD up, we put an old camera at the back of the
auditorium (unmanned) and wired it to a monitor backstage so she could see. I swear... it was surprisingly quiet on the Coms when I did that.