I was casted for a reality TV show long ago once.
I asked them, are events inside scripted?
They told me no, but they'd always make suggestions to you, like "Hey, how about you walk around topless in the house?"
Stuff like that. Oh and yes, it was a Jersey Shore-like reality show, so it'd have been pretty douchey lol.
Yeah, a lot of manipulation going on to show the story they want to.
I guess it's kind of legit still.