Let's face it, at most one if your identities can be tied to your actual real-world activities. Otherwise people can find enough correlations to out you. Witness JK Rowling's new book.
JK Rowling's dox was a result of a member of the publishing house's solicitors telling his wife, who then told a close friend who provided the initial leak on twitter, which gave the newspaper breaking the story enough to go on to start drawing those conclusions.