OG is quite right that we shouldn't discourage people who might not be confident in their communication skills from posting. I would never want to exclude anyone. I am no Hemingway, myself, or otherwise I would have made my original point better!
I don't think asking people to click "Preview Reply" and look over their message discourages questions, any more than asking people to search the forums before posting discourages people who don't know how to work the search feature, or asking for tank parameters discourages people who haven't the slightest notion of what nitrites and nitrates are. This is a casual Internet message board, and nobody is expecting Pulitzer-prize material.
The title of this sticky is "How to Help Us Help You." The fact of the matter is, if you take an extra moment to look your post over and make sure you've expressed your problem clearly, you will get better help. It is easy to verify this with a quick browse through the archives -- messages written with care get more responses. I don't think this is because of elitism -- I certainly would try to help messy and clean posters alike -- it's just easier to answer a question when you know exactly what a person is experiencing! Nor do I blame anyone for posting a messy question -- it is hard to think straight when your fish are in trouble. That's why it can be important to spend that extra moment to get your thoughts in order. Just like the ambulance gets there faster if you speak slowly and clearly to the 911 operator, one way to "help us help you" is to put together a lucid, informative post.
I'm sorry that my initial post may have come off as elitist. I didn't intend to even suggest excluding anybody. I wish, however, that instead of being told that my comment "doesn't fly" and being told, "If you choose not to read poorly written posts, that's your choice," I could have been approached in a more courteous, less confrontational manner. OG's post, ironically enough, did not make me feel very welcome. I appreciate respectful disagreement. When I am trying to make a helpful contribution to the AC community, I don't deserve a curt reprimand.