Twitter has rolled out Safety Mode feature for a limited number of users.
“Safety Mode is a feature that temporarily blocks accounts for seven days for using potentially harmful language — such as insults or hateful remarks — or sending repetitive and uninvited replies or mentions.”
“When the feature is turned on in your settings, our systems will assess the likelihood of a negative engagement by considering both the tweet’s content and the relationship between the tweet author and replier. Our technology takes existing relationships into account, so accounts you follow or frequently interact with will not be autoblocked.”
Authors of the tweets found by Twitter to be harmful or uninvited will be autoblocked, meaning they will temporarily be unable to follow your account, see your tweets, or send you direct messages.
This feature has been rolled out to a small feedback group on iOS, Android, and Twitter.com, beginning with accounts that have English-language settings enabled.