Contact your friends Write a message where you explain why you have started the petition, since people are more likely to sign it if they understand how important the topic is. Open the petition page and click the Facebook button to share the petition on Facebook. How to sign petition Despite being branded a 'patsy' by Salman Rushdie after declining to sign petition calling for release of fellow Nobel laureate Liu Xiaobo, Mo Yan reiterated view that a level of censorship is.