Well, I'd suppose if canon is presented in say, Zelda Theory, then they would have to accept/believe your stance. Mature Discussion is much harder. Which is why I watch what I say there.
I used to post 10 paragraphs, and I sorta burned out. I'm easing myself back in with 6 or so paragraphs. But I don't try to get into heated debates either, it's rarely worth it.
Not really dorky... I did an "essay" as you would call it on the Happy Mask Salesman. I'm chatting with some friends, probably going to post a bit. Rare for me.
Oh, no. I went to google images, I've finally figured out keywords that work best. Usually, I just write a file name, hoping for that result. It works most of the time.