Let's analyze over data!
Season 3:KRK throwing a bottle at Rohit Vera... it hit a little bit to Shamita, not intended violence. Evicetd!
Season 7: Kushal caught Andy's collar, not even violence. Evicted!
Season 8: Puneet Issar pushed Arya Babbar by mistake, no attack, just push. Evicted ... but reentered.
Season 11: Priyank evited for a little push, Akash Dadlani did not even fall. Evicted!
Season 13: Madhurima Tuli hit Vishal horribly. Biggest violence in the history of BB. Evicted, but the same topic was made fun of, made into dance rehearsals, re-enacted in Khatron Ke Khiladi.
Season 13: Siddharth Shukla hit Asim 11 times, he got bruises. No Action.
Season 14: Rakhi Sawant pulled Abhinav Shukla's boxers thread. It's a SEXUAL MOLESTATION as par India's PENAL CODE 41, sexual violence act. No Action.
Season 15: Karan kicked, pushed, threw Pratik. No action.
So what changed? Manisha Sharma became Bigg Boss creative head from Season 13. Simple!!!!!!