I recently discovered on a forum untrue and defamatory remarks regarding myself, which is potentially very harmful to my reputation as a photographer if someone searches me on google for instance. The comments originated from an individual who doesn't even know me and made an assumption based on a complete misunderstanding. I have been in touch with her since and believed all to be resolved. Odds are my name has been tarnished elsewhere by the same individual... The forum itself is photography related though not exclusively and I have tried emailing the forum admin but to no avail. What can I do?