Dear Martian Life, Hope This Finds You Dead?

PopSci Blog has a great post on Chris McKay, NASA planetary science, and his argument that it might be better if any Martian life we find is already dead. Interesting idea considering we haven't the foggiest clue what ethical, moral, or scientific conundrums may be raised by a run-in with the locals as we explore the galaxy. I have to say, though, that McKay may be one of the funniest scientists around.