Because it’s so easy to set up a new Twitter account and users don’t have to share any info that would immediately identify them in the real world, the social media platform is overflowing with fake accounts and users who harass others while hiding behind screen names. It’s a well-known problem with Twitter, but one that the company has done little to acknowledge beyond making vague promises. But recently leaked e-mails show that Twitter CEO Dick Costolo is fully aware of the issue. [More]