I'm running multiple sites on more subdomains of one of my domains (the sites have different subjects). I wonder if one of these subdomains would get a Google ban, would this mean a ban for all the subdomains and the domain of these subdomains as well? (even if the subjects of the sites are different?)
not sure about that.. maybe if all applies the same work, content, etc on it, then there is a possibility..
its depend upon various factors ...Like your all sub domains are linked with with each other and look all sub domain is related to each other then may be it cause the ban of all sub domain
No, the subdomains are not related - they have all different subjects and they are not linked with each other.
Any more replies? If one of my subdomains gets a Google ban, will this mean a ban for all my subdomains on the same domain and for the domain itself?
Depends on the quality of each sub domain. I wouldn't link them together. If you do someone will probably submit a spam report and a member of the Google spam team will definately remove your entire website. If your worried then chances are that you're doing something wrong. Why would you worry if you wern't? However if you're not then you have nothing to worry about. Google won't automatically de-index your entire website because one subdomain violates the webmaster guidelines. If it did every blog hoster on blogger.com would be gone in a second. What would happen is a member of Google would review your website to look for violations. If they find them then chances are your entire websites gone.