The document discusses astroturfing, which refers to imitating or faking grassroots support through coordinated efforts. It describes how persona management software can automatically generate large numbers of fake online profiles to manipulate public opinion. The software allows people to pose as many different users simultaneously and make it difficult to identify the true source. The document expresses concern that such tactics threaten online democracy and debate by obscuring real from fake opinions. It provides examples of astroturfing campaigns in politics and by corporations, and notes that even the US military is seeking persona management tools.