The bomb threat tweet was sent to Freeman, the Europe editor of Time magazine, Catherine Mayer, and the Independent columnist Grace Dent, who took a screen grab of the tweet and posted it for her Twitter followers to see.  After rape and bomb threats, site to updates rules, roll out 'report abuse' button more widely and use extra staff to police tweets 
 
 Twitter has issued new rules to try to clamp down on abusive behaviour in the wake of rape and bomb threats made against female journalists, an MP and a feminist campaigner. Extra staff had been put in place to handle reports of abuse and from next month an in-tweet "report abuse" button, already available on some mobile devices, would be rolled out on the main Twitter website and apps. In a message posted on the Twitter UK blog on Saturday, the senior director for trust and safety, Del Harvey, and UK general manager, Tony Wang, said the microblogging site had updated its rules to make it clear that abuse would not be tolerated. Related story Twitter to simplify the reporting of abusive tweets, after outcry over rape threats 
 
 "I personally apologize to the women who have experienced abuse on Twitter and for what they have gone through," Wang wrote in a series of follow-up tweets. "The abuse they've received is simply not acceptable. It's not acceptable in the real world, and it's not acceptable on Twitter...There is more we can and will be doing to protect our users against abuse. That is our commitment." Some of the factors that we take into account when determining what conduct is considered to be targeted abuse or harassment are: ♦ if you are sending messages to a user from multiple accounts; 
 
 ♦ if the sole purpose of your account is to send abusive messages to others; 
 
 ♦ if the reported behavior is one-sided or includes threats. A post on the U.K. Twitter blog mentioned plans to add additional staff to the teams that handle abuse reports and updates to the Twitter Rules. The UK branch will work with the UK Safer Internet Center to "expand user resources on digital citizenship and staying safe online" and will also "use the Twitter platform -- including Promoted Tweets and a Promoted Trend" to publicize the center and its resources. Twitter found itself in the spotlight after three female journalists, including the Guardian columnist Hadley Freeman, said they had been the subject of bomb threats on the site, while the Labour MP Stella Creasy and the campaigner Caroline Criado-Perez received threats of rape. Scotland Yard said its e-crime unit was looking into the claims, three of which involved incidents outside London.
– Twitter is finally cracking down on abuse after a number of incidents in the UK where high-profile women were threatened via tweet. Both a feminist activist and a politician were threatened with rape last month, while several female journalists were tweeted bomb threats, reports USA Today. After an online petition garnered 125,000 signatures calling for Twitter to take "a zero tolerance policy on abuse," and criticism from British journalists and politicians, the social media service has announced it will change its rules and add a "report abuse" button for tweets, the Guardian reports. The new rules state that users "may not engage in targeted abuse or harassment," especially if "the reported behavior is one-sided or includes threats," CNET reports. In a blog post by Twitter UK, the service says it will also add extra staff members to handle abuse complaints, and will work with the UK Safer Internet Centre "to expand our user resources on digital citizenship and staying safe online."