I have been attacked (at a time in my life when the last thing I needed was more stress!) by a patent holder before, so hey I hate software patents:
http://www.infoworld.com/article/2619609/open-source-software/why-software-patents-are-evil.html
http://www.infoworld.com/article/2619609/open-source-software/why-software-patents-are-evil.html