http://genome.fieldofscience.com/2011/09/black-death-is-dead.html
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Call me dense, but I don’t quite get your subject line.
So the black plague died off because it was too deadly. Are you saying that if we kill too much stuff, we’ll be effectively killing our host like the plague bacteria?
While somewhat interesting and, for me, informative, I’m not convinced, and think we should continue to kill everything. 
No. I’m saying something well known in evolution: a species that kills everything ends up dying too.
Because we’re too deadly, too fast. Just like the black plague.
Should I keep “killin’” the ladies with help of my sweet The Who t-shirt?