These days - life online in either Forums or Blog Comments can be hilarious at times. Specifically, with the absence of face-to-face interaction (or any perceived consequences), people tend to go off a bit more. Person makes Point A in a blog entry, Person B debates it in the comments....and often it deteriorates into a "just how stupid the other person is" argument. If you actually remove any emotion when reading (or if you are involved), it's actually quite comical.
This old Monty Python sketch is worth a watch: