THESE HUMAN ERRORS COULD CAUSE THE EXTINCTION OF LIFE ON THIS PLANET ONE TIME

The other time i  bought a pen from a hawker .It was a black pen ,the AIHAO brand of pens .I the went on to use the pen .when it was used halfway ,the pen changed colour from black to blue .Then i remained wondering what might have happened to the pen .I thought that this pens were computer ink filled in the factories ,and now this one had two different colours in it,black and blue and ,it was an imported pen from china imagine .This human errors will one time cause distinction to mankind .Firs it was the chinese milk that was poisoned due the same reason and now it is a pen ,next it could be something bigger ,perhaps the nuclear missiles will start flying by themeselves in to the air and kill all human beings .You can't blame the hawker boy ,he doesn't even have the knowledge of how to start it Or could there be something going o behind the streets?