Communications security involves the ability to send a message without it being intercepted and blocked. Censorship, whether done by a government, misconfigured firewall, or blackhat hacker is a type of counter-intelligence. As such, both blocking specific messages and getting around such blocks fits squarely within the realm of infosec. As long as the question is not specifically asking how to break a specific system without showing understanding of the concepts is a close reason we have. We do not, and should not, have a close reason for evading censorship.