An additional feature of concern to the new Google privacy policy is the nature of the policy. One must accept all features or delete existing Google accounts. The update will affect the Google+ social network, therefore making Google+’s settings uncustomizable, unlike other customizable social networking sites. Customizing the privacy settings of a social network is a key tactic that many feel is necessary for social networking sites. This update in the system has some Google+ users wary of continuing service. Additionally, some fear the sharing of data amongst Google services could lead to revelations of identities. Many using pseudonyms are concerned about this possibility, and defend the role of pseudonyms in literature and history.