I think the more important points here are the potential for abuse (i.e. someone trying to hide legitimate information they have no right to hide), and the fact that the pages being removed from the indexes of these search engines still exist and only display publicly available information. No one's privacy is being violated in the first place, only their reputation and for valid reasons. These are things like news reports and public records that people are trying to hide. I agree that in some circumstances, a person's past mistakes shouldn't hang over them forever, but this isn't the way to go about redeeming themselves.
And what about people who have been convicted of a crime. Does their privacy trump my right to know if I'm dealing with a dangerous offender?