We do not tolerate the harassment, threatening, or bullying of people on our site; nor do we tolerate communities dedicated to this behavior.
Reddit is a place for conversation, and in that context, we define this behavior as anything that works to shut someone out of the conversation through intimidation or abuse, online or off. Depending on the context, this can take on a range of forms, from directing unwanted invective at someone to following them from subreddit to subreddit, just to name a few. Behavior can be harassing or abusive regardless of whether it occurs in public content (e.g. a post, comment, username, subreddit name, subreddit styling, sidebar materials, etc.) or private messages/chat.
Being annoying, downvoting, or disagreeing with someone, even strongly, is not harassment. However, menacing someone, directing abuse at a person or group, following them around the site, encouraging others to do any of these actions, or otherwise behaving in a way that would discourage a reasonable person from participating on Reddit crosses the line.
To report Harassment, please visit this page.