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Occupy Wall Street protesters meditate while a sign bearing their Twitter hashtag hangs from a railing in Zuccotti Park in October. Some activists accused Twitter of censorship because #OccupyWallStreet wasn't appearing on trending lists. Jessica Rinaldi / Reuters/Landov The list of "trending topics" on the right side of Twitter's home page is a coveted spot because millions of people see it. It often reflects what's hot in the news, from the death of Steve Jobs to Kim Kardashian's latest exploits. Sometimes a topic that seems hot, like Occupy Wall Street, doesn't trend, leading some activists to charge Twitter with censorship.