With the latest Google algorithm update, codenamed panda, Negative SEO has now become an issue everyone must be concerned about. It is now possible for mailcious SEO’s and hackers to negatively affect search engine rankings simply by pointing some of the wrong links at your website.
Building links from authoritative websites that have a real audience and real users is the best link building strategy.
The ability to defend against a Negative SEO campaign is related to your branding and the authority, depth, and quality of your site’s link portfolio.
They will hopefully create a section in Google Webmaster Tools that provides a disallow links feature to disavow any link pointing to you.