Someone, somewhere did not like Liskula Cohen, a model in her 30s who lives in New York. A blog was launched from Google’s Blogger platform, apparently devoted to maligning her, complete with uncomplimentary photos. To be sure, such online attacks are hardly rare; indeed, Cohen’s story diverges from most such incidents because she fought back — and it appears she has been, to some degree, successful. Cohen complained to Google, according to media accounts, and requested the name of the poster.