"Scott Adams’ The Dilbert Blog has some helpful advice about debating on blogs – from Auds at RealityCheck(dot)ie
If you are new to the Internet, allow me to explain how to debate in this medium. When one person makes any kind of statement, all you need to do is apply one of these methods to make it sound stupid. Then go on the offensive.
Some highlights -
Assume the dumbest interpretation. For example, if someone says that he can run a mile in 12 minutes, assume he means it happens underwater and argue that no one can hold his breath that long.
Hallucinate entirely different points. For example, if someone says apples grow on trees, accuse him of saying snakes have arms and then point out how stupid that is.
Use the intellectual laziness card. For example, if someone says that ice is cold, recommend that he take graduate courses in chemistry and meteorology before jumping to stupid conclusions that display a complete ignorance of the complexity of ice."
At least no debaters on this forum would "apply one of these methods to make it sound stupid. Then go on the offensive."