The March 2007 Global Threat Report by ScanSafe claims that up to 80% of blogs contain potentially offensive content, which can range from adult language to pornographic images. The most requested blog site during the month was found to be blogger.com.
About 6% of blogs were found to host malware. ScanSafe report that the content on blogs and other sites powered by user contributed content is constantly changing, which makes Web security solutions that rely on Web crawling rather than actually scanning the URL each time it is requested can leave users exposed to malware and unwanted content.
Surprisingly, the survey also found that 11.4% of Web filtering blocks imposed by companies were to prevent users from accessing search engines and portals, which is second on to the 23% of Web filtering blocks preventing access to Instant Messaging and chat services.