Corporate cybersmear: For many corporate executives, the phrase evokes images of furtive Internet message board postings coldly calculated to manipulate the price of a company’s stock or to defame the company’s management.

That image could not be further from the truth, at least according to many of the message board participants who have been sued by companies in so-called “corporate cybersmear” lawsuits. Increasingly, cybersmear defendants have fought back with a vengeance, using a variety of tactics against companies that have sued them.