Karen Sandler has an interesting story about medical devices and how they are, literally, putting her life on the line. She's both a lawyer and a hacker, and you should hear the stories she tells about how people distrust her for this and think she's trying to trick them when all she wants to do is learn about the software and hardware that is keeping her alive:

https://www.youtube.com/watch?v=iMKHqO28FcI