Spammers have now leveraged the popularity of Harry Potter's star Emma Watson in a Facebook scam that offering Sex tape of popular Hollywood movie star Emma Watson with a malicious link, actually spreading the malicious links and Porn images on infected user's profiles.
This isn't the first time Emma Watson has been used as the bait in a scam and it surely won't be the last. The worm hitting Facebook Profiles and Groups with post of malicious porn link and tagging others too in same post.
In meantime, the virus will spread on victim's profile and automatically will post same Emma Watson scam post on their wall, tagging 12-15 friends on the comments. This new post will them offer same video and steps to others.
Update : The people who are running this scam are earning huge money from advertising networks. AlterVista Hosting, where the script was hosted by cyber criminal at subdomain "nglscripts4" is now removed by web hosting service, because of their ToS violation.
You should never click on a link that appears on your Facebook page with some malicious content, either its from someone you know.