Well
I am absolutely sure that alien life forms have invaded earth. They regularly start up controversial threads on this forum (and other forums I suspect till they get banned), and always sign their names with pseudonyms.
They seek to take over by introducing selected topics that have two schools of thought that are diametrically opposite with no mean ground and no hope of one side or other convincing the other.
It goes under the general heading of "Divide and Conquer"
There! That should stir the pot a little.
Barry