Around 3 in 20 of the videos posted on Facebook have been identified as likejacking attacks, where scammers try to trick you into Liking a piece of content without your knowledge or consent. ZDNet reports that Internet security company Symantec analyzed a sample of 3.5 million Facebook posts with videos on August 2, where it was found that around 15 percent of unique posts were actually likejacking attacks.

Likejacking is where you are deceived into clicking on something that forces your Facebook account to Like it and then the content is automatically shared on your Wall and the scam is spread to your friends. These attacks may also lead to malware being downloaded to your computer. One particular example of this kind of attack spread throughout Facebook in June — the scam claimed to offer a video of a girl stripping on webcam.

Likejacking attacks often take place on a Web page that displays a fake video player with malicious code hidden behind it. If you click anywhere on one of these pages, the scammers responsible for the attack may be able to take over your Facebook account. While anti-virus programs and companies such as Facebook partner Web of Trust and Symantec (through its Norton Safe Web app) may help protect you from these attacks, the fact that as many as 15 percent of posts containing videos on Facebook are likejacking attacks means that many users of the service are still falling victim to them.