Often these fake names were such wild and vulgar characters that they slowly began to have little to do with their authors. Samuel Clemens had an incredibly tragic life before his alter-ego became famous. By the end of his days, many people claimed he would alternate between the two identities, revealing Clemens to steadily fewer people. If you want to read some of the most incredibly withering comments ever conceived, just read some of Orwell’s articles attacking pacifist politics during World War II. He was not someone you picked a fight with lightly. Yet in person, he was sickly. When it comes to fake identities and writing, their biggest function has always been to find a way for big ideas to come from big places. Mark Twain had a witty remark to every question, could drink you under the table, and smoked cigars constantly. Samuel Clemens could only pretend to be such a wild person.
— From an article about an ‘ARG’ on a games blog. Square old me doesn’t know what an ARG is but I liked this paragraph, a sympathetic view of the performed online self that gets lost in the endless calls for “authenticity”.