I agree with most of what you said, except for this:
3.)
Spelling and Grammar. Generally text is the only way in which a clan can get to know you. Thus, it is good to evoke decent spelling and grammar so you don’t come off as an idiot. However, it is hard to define strictly just how well you should use these two things. If you overuse them, you will come off as someone who thinks you’re better than everyone else (i.e. capitalizing every sentence and using perfect punctuation). Not misspelling words makes it clear to the clan that you have some cognitive abilities. Using acronyms is sometimes convenient and not looked down upon. The ‘words’ ‘u’ for you and ‘ur’ for your usually aren’t that bad. However, rewriting ‘anyone’ as ‘ne1’ or no one as ‘no1’ makes you look like an idiot (there are many possibilities here as you can see).
There is also a fine line between typing like a newbie because it’s funny, and typing like a newbie because your brain actually functions like that. This line is usually drawn where one over exaggerates how a newbie would type. For example, ‘hI Im neW 2 Teh hoLE chEeTinG SeeN lOl!!’ This is clearly grossly exaggerated and funny. However, typing something like “me killer and shake we are [FIRE] just won are ferst clan battle we won 2 he one 1 we wint v pmw and we rocked” is obviously a product of an underdeveloped mind. (This specific quote can function with the truth of criterion 1 and 8 as well.)
If I'm getting shot at from 10 different locations, I'm not going to bother typing "anyone" out. Otherwise, yes, I will. Also, watching my punctuation and grammar doesn't make me an elitist snob (which was what you were hinting at in your statement), it merely means I care about what I'm saying.
You have very good points, just a pretty bad way of stating them (can't you find more constructive words than "idiot" and "moron"?).