Facebook is suing a marketing firm, accusing it of "spreading spam through misleading and deceptive tactics".

Adscend Media is alleged to have carried out "clickjacking".

The practice involves placing posts on the social network which include code that causes the links to appear on the users' homepages as a "liked" item without their permission. The links are designed to take users to other sites......

http://www.bbc.co.uk/news/technology-16755434