I think they were too busy enjoying the show to be troubled by that. Also the camera wasn't "in their face" so they would have no idea when it was focussing on them. I was once at an indoor event which was televised and you really couldn't see what the cameras were doing.
If anyone who missed it, or wants to watch it again, it's been posted on this thread - http://www.murraysworld.com/forum/andy-murray/andy-murray-mock-the-week/msg753441/?topicseen#new
- it was really hilarious so I hope Mark or somebody else on MW manages to download it onto YouTube. Unfortunately I haven't a clue how to do this. I watched it later on on BBC iPlayer, but it'll only be available for 7 days.
Aye but they have a big screen to the side of the comedians which shows everything we can see on TV, albeit most of the time, so there is a chance they would have realised.
Either way, I'm sure they didn't care at all, seemed to be having a good time.