A recent report from Websense, an Internet security solutions provider company, estimates that "95% of comments to blogs, rooms chat and forums are spam or malicious. "It is an impossible statistical sounding at first, and it may just make you want to close your browser for good. But if you have spent time working in research or community management (as I have) or if you already have a blog, you will realize that it is probably true. It's bad news, but probably not as bad as you think.
the figure of 95% is from the many sites that Websense scans. They travel would have 40 million sites every hour. These figures include not only the blogs that you may know and love, but also blogs that have no control of spam abandoned blogs that are more moderate, and blogs that are built by spammers themselves and populated with spam comments. These three probably inflate slightly numbers and make it seem as if your favorite blog is only 5% trustworthy. There is a total number, a statistic per page.
This does not deny that there is a large spam / malware problems there related to social media. Social media sites are like any real social space: Not everyone is trustworthy. Maybe it's a good idea to go on websites and with the attitude that only 5% of links are trustworthy. It can be a healthy dose of paranoia, but it is also good to look behind the numbers.