This paper analyzes comments by readers of an online article in The Punch Newspaper entitled “CAN crisis deepens”, the crises that threaten to rock the Christian Association of Nigeria, CAN. It aims to show how name calling and vulgarity as a trademark of language use in the virtual community can pose a threat to national peace and security. Some of the comments that trailed the article deviate from civility, break the conversational and politeness maxims, extend the frontiers of the discourse at hand and inundate it with name calling and vitriolic language. The method used in this paper consists of highlighting the comments and analyzing this discourse using Grice’s Cooperative Principles and Politeness Principles of conversation. The paper concludes that public discourse among the netizens (members of virtual community) has the tendency of degenerating into expletives, discourtesies and disparagement because the public space is a faceless one; hence the comments which have deviated from the norms of civilized discourse pose a threat to religious peace and harmony among Christians in Nigeria and by extension to national peace and security.