This may look surprising, but it is true.

According to Scansafe’s Monthly Global Threat Report for March 2007, a surprisingly high percentage of the Internet’s blog sites– up to 80 percent– contain “offensive” content, with six percent hosting active malware.

The Internet’s blog sites have become overgrown with a variety of unpleasant content, including porn, offensive language, hate posting, and malware, a new threat analysis has suggested.

The figures were gleaned from an analysis of real-time traffic passing through the company corporate proxying service, designed to filter out the worst content. A total of 614 sites were chosen at random from sites reckoned to have blogging as a significant activity.

“There were as many blogs with the ‘F-word’ as the word ‘China’”, said ScanSafe’s Dan Nadir. Because many legitimate sites could contain offensive material, the company didn’t block these unless the policy of the client specified such an action. The service was designed to filter out the worst offenders.

“Employees visiting these sites can unknowingly expose corporate networks to legal liability, viruses and loss of proprietary information.”

On a more general scale, the company’s services last year blocked a total of 12 million web threats out of 7 billion web requests, across 30 countries.