Studies of political discussions online have been dominated by approaches that focus exclusively on deliberation, ignoring other equally relevant communication norms. This study conducts a normative assessment of discussion spaces in two prominent web platforms—Twitter hashtags and newspaper comment sections devoted to particular political issues—applying the norms of communitarianism, liberal individualism, and deliberation. The platforms’ distinct design features and users’ left/right issue stances emerge as significant predictors of normative differences.