I heard that if subdomain of any domain get banned form SE than main domain also get banned. Is it true? I mean if any one has any experience about that? For example mysite.domain.com get banned than domain.com will also get banned? If yes than why and how? I also read that search engine spider can not differentiate domain and sub domain, it counts as a URL.
It might be true in some cases but I am sure that are thousands of blogspot and wordpress blogs (subdomains) that have been banned by SEs and the main domains are still fine.