Looking for something else, I stumbled across this from Eugene Volokh, quoting Patterico:
“[T]hink twice when you’re the only guy in the world with an amazing insight.” Or, as they say, “They all laughed at Columbus. But they also all laughed at Bozo the Clown.”
[In reference to a guy who wrote a very snide post mistaking a news report typo for fact, and even expressed amazement that no one else had picked up on the point.]