I guess it might not be 100% real life.
I expect they censor themselves a little bit, more so when they first arrive, but eventually the camera's will become "invisible" to them and they may think **** it, and just do stuff normally. To constantly remember to play up to the cams would be a crappy life and not a home I would want to be in.
I suppose some of them could keep it up, but they would have a miserable time always on edge and never truly relaxing.
Real Life is exactly what it is isn't it? If they had to make sure they were giving the best view of their sex organs when they change then it would not be real life or normal? Maybe what needs to change are the camera's have fewer blind spots and reduced distance to where the tenants spend their time.
Which is why the guest does not have to show parts of themselves on camera and/or shower if they don't want to.
I find this to be a common occurrence. Barring work (Which I'm not sure all of the tenants do), most people stay awake until they are too tired to continue. Most people also like to stay in bed as long as possible. With no reason to get up, and therefore you are no tired until much later, the whole "awake until 3am, sleep until 12" is what I would expect.