MR JUSTICE WARBY Approved Judgment Monroe v Hopkins [2017] EWHC 433 (QB) 17. When people RT, Reply, or Like a tweet by @Person, then @Person gets a small message (and ‘alert’) in their Notifications tab telling them so. There are no notifications when a person whom you follow deletes a tweet. 18. Some tweets are different, because they also contain another user’s username (@Other) or more than one other user’s usernames (@Other and @Stranger). These usernames can occur anywhere in the tweet. This type of tweet is called an ‘atmention’, because it ‘mentions’ other users. 19. If @Person tweets and uses @Other somewhere in the tweet (“I watched the football and saw @Other score!”), then even if @Other doesn’t follow @Person, @Other will also receive a Notification of the tweet by @Person (unless they have first Blocked or Muted tweets from @Person). However, subject to the point below, at-mentions are sent to all of @Person’s followers. 20. If, however, @Person begins their tweet with a username (@Stranger), this particular type of at-mention is called an ‘at-reply’ (because it is in the same format as a Reply to a tweet, in that it starts with a username). 21. An at-reply (such as “@Stranger good to meet you today”) will not appear in the timelines of all of @Person’s followers. It will only be published to the timelines of those who follow both @Person and @Stranger (the timelines of “common followers”). 22. However, beyond the timelines of common followers, an at-reply will also be published on @Person’s profile page (like any tweet), and is still capable of being RTed by anyone who sees it (such as @3rdParty). If RTed, an at-reply will still appear on the profile page of anyone who RTs it (i.e. @3rdParty’s profile page), and will be sent to the timelines of all of the followers of anyone who RTs it (i.e. all of @3rdParty’s followers’ timelines). 23. Where @Person decides that they do not like the tweets by @Stranger, they can ‘Mute’ @Stranger (so @Stranger’s tweets don’t appear in @Person’s Timeline, even though @Person still ‘follows’ Stranger and can see tweets on @Stranger’s Profile). 24. If @Person really doesn’t like tweets by @Stranger, they can ‘Block’ @Stranger, and neither @Person nor @Stranger will be able to receive each other’s tweets into their respective Timelines or view each other’s tweets on each other’s Profiles. However, no tweets are deleted by Blocking, and all tweets of a Blocked person are still available for everyone else to see as before, including in any search results. 25. For more serious abuse, @Person can Report an account (e.g. @Troll) to Twitter. If Twitter decides the abuse is serious enough, it can Suspend or Ban the @Troll account, which has the effect of making all of @Troll’s tweets and @Troll’s Profile unavailable for anyone to see. Any at-mentions (including at-replies) which cite ‘@Troll’ will remain the same text, but the link on the @Troll username will no longer be a live hyperlink to the @Troll Profile page. 26. Twitter Analytics allows a @Person to know all the Impressions and Engagements of each of their un-deleted tweets (including at-mentions and at-replies). It also