Most Helpful Girl
This does happen often, and it is usually when the person realizes they A) Can't win
B) Are themselves being ignorant
or C) They realize they're wrong.
People who do this tend to be ignorant honestly. Or they think they're right and don't want to admit that they're in the wrong. It's their way of telling themselves they won.0
Most Helpful Guy
Not everyone but a lot of people argue with this "I'm right you're wrong" attitude. Anyone who has an oposing opinion to theirs is either intellectually inferior, insecure, or bitter.1