Occasionally in the skeptical/science blogosphere there is a debate over how to deal with proponents of pseudoscience. Some argue that every tool should be used to debunk pseudoscience, including rudeness, aggressiveness and insults.
I usually prefer a less aggressive approach, by trying to understand the other person’s views, and challenging them on the basis of the (lack of) evidence and the scientific method. A good sense of humour also helps as well.
The following clip is a good reminder of why it pays not to be too rude to others.