Some 'gurus' believe that aggressive link building and bot submission tactics can get your site DE-INDEXED from Google. Now I'm no genius but if this were true, wouldn't every competitor just dump links on a site and get them de-indexed?
I've had this argument with a very close friend of mine for a couple of years now and neither of us have any proof. He is adamant that aggressive link building tactics will drop your rankings. I'm more of the school of thought that Google will not punish off-page SEO tactics however they will not give credit for such tactics, therefore leaving you with 0 gain.
Does anyone feel they have a really good idea about this? Or better yet, evidence/case studies??