Presumably if the other housemates know they are being watched they are deliberately not going to say bad things about them as they will avoid the fall out. The only way I can see this being interesting is if they are given lots of mini tasks. So main housemates are told to say bad things, or the people in the room are having to choose people to get gunged or do bas things and the rest of the housemates will know who is to blame.
The best secret room task was Speidi as they got royally slagged off by the likes of Rylan and Clare that the fallout was tremendous.
What always amuses me is that whenever they come back everyone shouts "I knew it, we knew it" and they clearly had no idea. In fact we now know Perez's walk out was not staged at all, but still Callum knew it all along - did he f**k!
It'll be interesting to see how this one works. It really has to be someone who is not diplomatic, so not Scoop, Sherrie, Gail, or the lovebirds.
Janice would be good.
Austin and James would be interesting.
Jenna would be good so she can see what Farrah is like without her.
I think it'd be interesting to have two opposing people one from each side put together, and no two dislike each other more than Natasha and Farrah at present.