At present, governmental agencies or private entities have increasingly been expected to disclose information on their practices, budgets and other relevant information concerning the public interest, whereupon such information inevitably becomes accessible to the general public. Such widespread information also means that the public can express their opinions, criticise, scrutinise, as well as discuss openly via social media platform. In response to the adverse effect suffered by the criticised person, Strategic Lawsuit Against Public Participation (SLAPP) is often invoked. In order to prevent a lawsuit from being exploited to suppress public participation, the enactment of legal provisions known as Anti-SLAPP law is deemed necessary. In this article, the example of such legislations will be articulated through the selected definitions and provisions of the Acts adopted in District of Columbia from the Code of the District of Columbia and California in the United States.