While Twitter has become home for groups of attackers who target people for whatever reason, there isn’t previously much tools to take-on such harassment or abuse.
But lately, Twitter has rolled out a variety of tools, which can keep the service usable even when you're a direct subject of attacks.
First on the list, is the filter tool which allows you to select topics you’re not interested in, like sports events or any specific team.
Albeit, Twitter’s filtering and blocking tools doesn't do much to categorize messages, such as using machine learning to group tweets by subject or hash tags, but it's obvious that Twitter analyzes all the messages that pass through its systems, as it offers data derivable from such analysis.
Also, the new Quality Filter uses “signals,” like mentions to recognize those people who have passed through Twitter’s verification process of proving that they’re both who they say they are and have a reason to protect themselves against impersonation.
Twitter mute option in contrast with blocking a user (blocked user can’t follow you, like or retweet your messages or see your tweets) still permit muted account to follow you and engage in other behavior, but you’re not notified of any of it as they don’t show up in notification or timeline.
Additionally, the Twitter website and its official mobile app, allows you to use a variety of ways to report an account, a tweet or even a Moment.