The March 2021 Subreddit Blackout was a massive site-wide protest where hundreds of major subreddits, including r/pics, r/gaming, and r/music, went private or 'dark' simultaneously. The movement was triggered by Reddit's hiring of Aimee Challenor and the subsequent administrative removal of posts or bans for users mentioning her controversial background. Users and moderators utilized 'Private Community' screenshots and blackout notices to signal solidarity against perceived administrative overreach and censorship. Today, the template serves as a historical symbol for collective internet action and the power of Reddit communities to hold the platform's leadership accountable during times of crisis.