And that can be cool! Discussions can get heated sometimes and that can be healthy. Debate is awesome as long as both people are willing to be possibly be proven wrong or stop the conversation when it is unresolvable.

If you can agree in one thread and disagree in another, awesome.

Discussions on the internets can devolve into ad hominem attacks quickly though. Another thing I noticed is that it's very tempting to "get the last word in", at all costs. Both of these things suck ass.

Words are hard. Words are harder when you type them. Words change meaning based on your frame of mind or specific biases. (Can someone please invent telepathy???)