The purpose of this chapter is to encourage and safeguard the constitutional rights of persons to petition, to speak freely, to associate freely, and to participate in government to the fullest extent permitted by law and, at the same time, protect the rights of persons to file meritorious lawsuits for demonstrable injury. This chapter is consistent with and necessary to implement the rights protected by the Constitution of Tennessee, Article I, §§ 19 and 23, as well as by the First Amendment to the United States Constitution, and shall be construed broadly to effectuate its purposes and intent.