let us say I have way to get back links in footer of all pages from some sites, like a link to script or a devloper is this a black hat seo and may considered paid links? I have a bad experience when added al ink of a new website to an old pr 4 blog (all pages), the blog was penalized ! many say google or SE want related links only nott just links so backlinks from all pages cosidered black hat ? thanks http://100fm6.com/
you cannot be penalise from a backlink not matter the amount of them. You just dont get any value from these links. Imagine you could get penalise from a backlink. Your competitor would pass their time at saboting you.
Yes, im sure. The linking site may get penalised. Why would you link to site that is non relevant and doesnt add any more value to your site adn your readers. Google as suggested that you use external links to proper site that add value to your content.