Anons, this federal statute does not apply in regards to censorship. Not even close.
"Not every harm you suffer or every violation of your rights is covered by Section 1983. There are two requirements. First, Section 1983 applies to the “deprivation of any rights, privileges, or immunities secured by the Constitution and laws.” This means that the actions you are suing about must violate your federal rights. Federal rights are those given by the U.S. Constitution, Amendments to the Constitution, and laws passed by the U.S. Congress. They are explained in part 1, below. Second, Section 1983 also says “under color of any statue, ordinance, regulation, custom or usage, of any State or Territory.” Courts have developed a short-hand for this phrase. They call it “under color of state law.” This means that the violation of your rights must have been done by a state or local official."
jailhouselaw.org/section-1983-lawsuits/