There were tasks in season 7, 8, 10, and 11 where contestants used to be restrained in a particular place either some cage, or trolley. In season 11, there were two such tasks, where you have to stay in your place. You can either pee in the open or give up the tasks. In season 7, there was the box surviving task ... whoever stays the longer, wins the captaincy.
What happened to all of it? Does BB didn't rely on this lot to give them physical tasks testing their patience and resilience?
Not all physical tasks can entice violence.