content: They are threatening to sue people who use Android and Linux, claiming that it infringes on patents which they don't disclose.  It's like an extortion bluff but when it's Microsoft (the gorilla in the room) they aren't willing to fight in court.  http://www.usnews.com/opinion/blogs/economic-intelligence/2013/03/29/time-for-transparency-on-microsofts-patent-troll-privateering