How Verbal Self-Defense Works
people.howstuffworks.com
people.howstuffworks.com
The methods suggested by the article are methods to avoid hostile language. I think most would agree that hostile language is no way to effectively resolve an argument. Of course, if it's about something "which you care profoundly", then of course you should take the issue on directly.
In the end, I think the article is good advice, especially against people you don't know that well.