Twitter #Thatsafrican and #thingsdarkiessay hashtags after users complained that they found the hashtags offensive. There are allegations that Twitter removed #NaMOinHyd from the trending list and added an Indian National Congress-sponsored hashtag. There are numerous tools for adding content, monitoring content and conversations including Twitter's own TweetDeck, Salesforce.com, HootSuite, and Twitterfeed.com. , fewer than half of tweets posted were posted using the web user interface with most users using third-party applications (based on an analysis of 500 million tweets by Sysomos). In June 2009, after being criticized by Kanye West and sued by Tony La Russa over unauthorized accounts run by
Twitter bomb their targeted users. Fake accounts are a common source of Twitter bombs. In order to avoid Twitter's spam filters and to overcome their lack of followers, Twitter bombs are often sent as a reply to existing tweets about the same topic. This is done in hopes that the authors of the existing tweets will retweet the response to their own followers, spreading the Twitter bomb before the fake account is deleted. With regards to numbers, an example of a Twitter bomb analyzed in one research paper described how nine fake user accounts produced 929 tweets in 138 minutes, all with