Reading the news lately, there is a lot of legal battle over tech patents. For example, Apple and Samsung are fighting over patents to the point of stifling further innovation. In addition, so called "patent trolls" -firms who buy patents in order to make a profit from legal settlements in court- make matters worse.
How does Drupal's open source license protect against such lawsuits?
For example, using the Rules contrib module and some intelligent configuration, you could replicate Facebook/Zuckerberg's "privacy settings technology", which they recently patented. Can Drupal users get sued over using Rules to replicate privacy settings?
I ask this because I am building a price comparison site that will compete with -for example- Google Shopping and TheFind, but built on Drupal. How does Drupal license protect against a lawsuit from Google for infringing their technology?
I'm not talking about front-end design, I'm talking about the Drupal PHP code.
Ok, maybe I'm paranoid, maybe not. I'd like to hear your opinion nonetheless!