How do you deal with harassment that continues across multiple communities?

Cross-community harassment — where a user follows you from subreddit to subreddit to demean, threaten, or repeatedly target you — is a violation of Reddit's sitewide rules prohibiting harassment and targeted abuse. The most important step is to document everything before you do anything else. Save links, take screenshots, and record timestamps of the harassing messages or comments, because Reddit's reporting system is more effective when reports include specific, verifiable evidence rather than general descriptions of a pattern. Use Reddit's built-in reporting tools to flag individual instances of harassment on each post or comment where it occurs, selecting the option that most accurately describes the behavior. For a pattern spanning multiple communities, the formal route is to submit a report to Reddit's admin team through the Help Center or the reddit.com/report page, explaining that the conduct is cross-community and providing links to the documented incidents. Reddit's Trust and Safety team has the authority to take action at the account level, which moderators of individual communities do not. Individual community moderators can only ban a user from their own subreddit, and a harasser can simply appear in a different community the next day. While waiting for admin action, you can block the user through Reddit's block feature, which prevents them from replying to your comments or sending you direct messages. Their posts and comments will also become less visible to you in many contexts. Blocking does not prevent someone from reading your public posts, but it significantly reduces the surface area for direct contact. If the harassment escalates to threats of violence or contains personal information (doxxing), that elevates the matter to content that Reddit's policies treat as a higher priority and may also warrant a report to local law enforcement depending on the specifics. Being public about experiencing harassment in relevant communities is sometimes effective at creating social accountability, but it also risks escalating the attention, so that choice requires careful judgment.