I've just encountered the following.
A user of linguistic SE, considering himself highly competent while in fact completely misunderstanding the topic, found his pride in bullying my question and explicitly voting it down. It doesn't seem to me that he found the question as bad initially. He obviously got upset when I dared to disagree with his answer (which he at first bothered to write, incidentally). There is no constructive critique on his part, but a flood of angry comments.
What is an adequate procedure to fight trolls off?