Pamoola's dashboard

Why is my real name still showing up in internet searches on sites after accounts have been changed to a pseudonym; this is occurring even when the account is closed. Is it possible to have the real name deleted completely from these sites so it doesn't show up in internet searches? Now, the pseudonym is linked to the real name & is appearing in the search, so what's the point of using a pseudonym?? (Not just on Twitter, but on other sites where an account is required--like Get Satisfaction, for example.)