It was a contentious issue with the site with regard to the ethics of marketing to children. It drew criticism from parents, psychologists, and consumer advocates who argued that children may not know that they are trying to be sold something, as it blurred the line between site content and advertisement. Children under eight had difficulty recognizing ads and half a million of the 25 million users were under the age of eight in 2005.[17][45] Dohring responded to such criticism stating that of the 40 percent of users twelve and younger, very few were seven or eight years old and that preschoolers were not their target audience.