The penalties from Google aren't final. If you do black hat SEO stuff and get depageranked, and then clean up your site, then over time you will get back into t

The penalties from Google aren't final. If you do black hat SEO stuff and get depageranked, and then clean up your site, then over time you will get back into the index. That said, it's certainly better if you don't have to rely on anyone else.