I once watched a film with a strong environmentalist slant to it which criticized overpopulation and, on some level, the individualistic capitalism required for there to be unregulated reproduction in the first place. I agreed with a lot of what was offered, but not all. However, I appreciated the effort.
I also once visited an Internet message board where someone who very poorly criticized the film was told to "stay the hell away" from the board if he didn't have anything constructive to add, critical or otherwise.
I find this highly ironic, since the best thing to offer the person who'd made the thread would have been education. Rather than shoo the person away for his belligerence, why not interview him? You may not change his mind, but it's equally unlikely that you'll change his mind about continuing to post on the board.
It's ironic because the film criticized social alienation, and what better way to alienate those who oppose our views than to tell them to shut up and leave? This kind of behavior is everywhere in our society; most people enjoy displaying their intellectual accomplishments, but very few are actually living by what they say. Pathetic.