Well or unwell, I believe it's simply more than correcting language. There's a lot of nonsense said all over the world and, in my humble opinion, everybody has contributed something to it. I do correct essays sometimes too and I know it's difficult to get over it sometimes but I try to restrain my need of correcting. I'm not to fix the world, I'm to fix the language of this particular writing. When I see an idiotic argument based on poor knowledge (but linguistically correct and logical enough - in the light of the poor knowledge), I repeat to myself, "Look at the language, look at the..." But whenever there's clearly poor language or complete lack of logic in it, then it's Hannibal ad portas.
I understand that if an educated demagogue posted their essay here you'd ruthlessly correct it as well. Well, to me, it would become discussing politcs then.
I think you just paid me a compliment. If so, I humbly accept. (As for discussing politics, that is what I am trying to avoid.)