It's even worse when the thread veers into something political. You can write a 5 paragraph essay about some topic and someone will eventually come out of the woodwork to point out: "On paragraph 4, in this statement, you generalized and said 'all' and I can find a counterexample. Aha! You should have said 'many'! Your entire point is therefore invalid!!" Pedantic nitpicking is just part of this culture.