1. You say "some on the left call for an end to capitalism." Care to name any of those people?
2. Large chunks of the population should be kept out of the conversation if they're completely ignorant on the given topic. I, for one, don't want to hear one more person on television say, "I'm no scientist, but..." and then proceed to make some completely unscientific argument about climate change or abortion or whatever matter of science is being discussed.