Spam and phishing have been ongoing problems at Twitter for some time, and tonight the company announced that it is stepping up its efforts to stop them with some new features, described as being able to “detect, intercept, and prevent the spread of bad links.” In a blog post, Twitter writes that the protection works by “routing all links submitted to Twitter through this new service … even if a bad link is already sent out in an email notification and somebody clicks on it, we’ll be able keep that user safe.