A small group of liberal activists who want conservative talk-radio host Rush Limbaugh off the air are not denying—as stated in an investigative report posted on Limbaugh’s website—that they have used automated software to generate massive numbers of negative tweets to companies they apparently have never patronized but that advertise on Limbaugh’s show. The automated generation of massive numbers of Tweets may be in violation of Twitter’s own rules. However, Twitter declined to directly comment on the matter—instead pointing CNSNews.com to its user rules. On Sept. 23, the rushlimbaugh.com website posted an extensive investigative report, The Hidden Story Behind Stop...