I agree with LePetiteFromage. We all have done things like check our personal email or facebook or IM at work. Those are things that technically we aren't supposed to be doing but we do them anyways. If your someone that has done those things then you are in no right to complain. If they are doing their jobs properlly then that is all that matters and that is all the people in charge care about. If for example someone missed a light cue because they were too busy watching the game on TV then that would be a problem. However, that isn't the case and people are using it as a backround noise rather then something that they are doing instead of or while they are working. It would be differnt if it was something that they were doing instead of working or something like that. But, there is no reason why a TV can't be on in the booth while they are doing their job.
It is like saying you can't have your Ipod on while your working and you can't listen to music in the backround while your doing something.
I have only had one personal experence where I saw the TV on in the boot. That was during Les Miserables at the Broadhurst where it was a situation that I was okay with becuase It was Daphine's rendition of I Dreamed a Dream which flat out sucked. It was a big rutgers football game that they were watching and it was great to have a distraction. I will admit that I did see a slight glare duing the show but it didn't bother me. I felt that they are doing their job who cares. And, I am sure that most house staff will hear the complaint however, they wouldn't really do much about it.
"If you try to shag my husband while I am still alive, I will shove the art of motorcycle maintenance up your rancid little Cu**. That's a good dear"
Tom Stoppard's Rock N Roll