They're very good at making statements with no evidence to back them up. Laughing at someone's position and saying "that's silly" or "that's totally absurd" unfortunately doesn't prove anything. They still can't explain why radiometric dating (done in a variety of ways, by many different labs which compare results) tells us that the earth is over 4 billion years old, or why God would have sorted the fossil record in the geological column in order to presumably deceive us into thinking evolution happens and the earth is old (or maybe they think it was Satan, who knows). Saying "it's all nonsense" and using silly emoticons doesn't touch any of this.