Negaitve Seo is a well disputed topic recently.
For those interested in the subject I decided to make a short compilation of the most relevant articles , with Links , they can find online.
1. As if business owners didn’t have enough to worry about when it came to marketing their business online when up pops a very real risk of unscrupulous competitors attacking your website in a bid to get your site banned from Google or have your search engine rankings drastically demoted to the nether regions of Google’s search results.
Negative SEO has been an issue for a while, but it is now hitting the mainstream. There used to be much debate surrounding the issue of whether or not a competitor could attack your website in such a way that it could have such a hard-hitting detrimental effect on your search engine rankings. It is now a harsh reality that negative SEO practices can cause your site to drop in ranking and even be removed from Google altogether.
Source : The Guardian.co.uk
2. Can we prevent Negative Seo ?
If someone really is out to get you and wants to spend the time and money, there’s no doubt they can do a lot of damage. In most cases, though, it’s just not cost effective, and building up a wall of defenses and monitoring your links every hour isn’t cost effective for you, either. So, what can you do to prevent the most common forms of attack?
Probably your best defense is to have a clean, authoritative link profile. Google is looking at your entire pattern and history of links, and if your site is strong with generally high-quality links, it’s a lot harder to do you damage with a short-term attack. The most vulnerable sites are new sites or sites that already have engaged in too much low-quality link-building. If 80% of your links are junk, it’s not going to take that much for a competitor to push you over the edge.
Source : Seomoz
3. There is also someone who thinks the answer for this is quite straighforward :
Just about any independent SEO worth their weight who publishes a number of websites has at least once hit a snag & been filtered or penalized. A person can say “not me” but how do they operate optimally in both the short term and long term if they never operate near limits or thresholds? But now that Google has begun actively penalizing sites for unnatural link profiles & tightening these thresholds, competitors have been giving one another shoves. Some of the most widely highlighted examples of crappy SEO were not attempts at SEO, but intentional competitive sabotage.
Source : seobook.com