Once upon a time, we had contrarians, advocates for the Devil, the sort of people who would laboriously research a matter just to remind us that the conventional wisdom need not be either conventional or wise.
But that was then, when entrance into the common discourse required a measure of competency. Today we have trolls:
I posit that if there’s a story about a firefighter saving a cat from a tree, it’ll be attacked by trolls. Some will think government money shouldn’t be spent on such minor activity, someone else will suggest the tree was harmed, some dog owner will suggest preferential treatment for felines, a person will note that it was a white cat and ask whether a black cat would have gotten equal treatment, and yet another person will declare that there must have been a payoff by the evil cat lobby.
While all these, um, individuals differ in their pronouncements, they all suffer from the same ailment: they think themselves far more clever than they actually are.