Should comedians have the right to offend people?

Should comedians have the right to offend people? Comedian Konstantin Kisin pulled out of a student charity event after being asked to sign a contract banning him from being offensive, before performing at a students’ union. He tweeted a picture of the contract he says he was asked to sign - it states - 'by signing this contract, you are agreeing to our no-tolerance policy with regards to racism, sexism, classism, ageism, ableism, homophobia, biphobia, transphobia, xenophobia, Islamophobia or anti-religion or anti-atheism.' But what do you think? Should certain things in life be out of bounds? Stephen got the views of commentators Lata Sharma and Bumper Graham.