Precisely - the author's obligation to the work depends entirely on the author's purpose with the work. If one were writing an ecological manifesto designed to alter the behavior of a vast swath of humanity, simply writing it and walking away would be irresponsible. If, however, one wishes to spill a trifle into the Sunday Times that was intended as a small, modest, thought-provoking piece, the best move is to leave it be.

I often quote Jeron Lanier in discussions such as this, who covers total anonymity, operational anonymity and pseudonymity in "You are not a Gadget." As a named author with a reputation and a body of work, hashing it out with the pseudonymous is a losing venture. There is no upside. You are effectively on trial against and endless sea of people in masks who want only to get their licks in. The most effective thing is to let the work find its own champions - after all, if your point didn't get across in what you wrote, that means you failed as a writer... and attempting to triangulate public opinion back to what you "meant" from what you "said" is always a losing proposition.