Some attackers have developed a way to enable a victim to like a piece of content without their knowledge. Bitdefender said the technique is used to spread threats quickly. The content auto-generates a posting on the victim's wall, broadcasting to people that the content behind a malicious link was liked. Typically the Like button is embedded in a video or image, automating the process of endorsing the link. Likejacking is believed to have been used to spread a lose weight offer last year. Facebook has done a good job of reducing this threat, according to Cosoi, but charity scams using phony donation requests continue to persist.