A federal judge in Arkansas has <A HREF="http://news.zdnet.com/2100-1009_22-6125028.html?tag=nl.r23660">thrown out a class action lawsuit</A> against Acxiom, which exposed massive amounts of Americans' personal information in a high-profile Internet security snafu three years ago. Even though a spammer had downloaded more than one billion records from the company, U.S. District Judge William Wilson ruled that there was no evidence that Acxiom's purloined database had been used to send junk e-mail or postal mail. Because the class action attorneys could not prove that anyone's information had actually been misused, Wilson dismissed the case and the request for damages on the grounds that any harm would be entirely speculative.