I don't mind spelling mistakes much - atefr all, it has been porven taht you olny need the frist and lsat letters in the rihgt palces for a wrod to be legilbe (or at least understandable) msot of the tmie. (That was painful. *icks*) And not everyone can spell - you don't have to be dyslexic to be illiterate, and some people just find spelling hard. Plus, if you type by "point and shoot" like I do sometimes you miss little spelling errors. (I've not mastered touchtyping, I stare fixedly at my keyboard and look up every now and then to check over what I've written - although I did manage to spell "farm" as "famr" twice in the same sentence, once, so it doesn't always work.)
Same with punctuation - so long as there's a few full stops in there so I can "take a breath" and work out what's been said, as it were, I'm fairly happy. It's those great huge non-capitalised non-punctuated sentences that i find really hard to come to terms with i don't know where the sentence stops and ends and some of the things might be new ideas but then some may relate to the previous sentence its painful to try and read it (and write it!) since you have to first decipher the writing before you can decipher the argument.
We don't really need to be Grammar-Nazis, do we? I mean, let's face it - if it's hard to understand, do we even bother reading it? I must confess I just skim over posts that don't have punctuation to see if I can extract the pertinent points fairly rapidly, or else I just ignore it. If someone can't spell brilliantly, who cares? If they can get their point across, is it really that big a deal that they spelt "extinct" as "exstinkt"? If they put in the occasional capital and full stop, who cares if they don't use apheresis dots or semicolons?
It's AOL-speak I'd love to kill. *grs* I can read "how are you, I'm great!" a lot easier than "how r u, I'm gr8!" and whatnot.
It amuses me that the people pushing for grammar the most are the people I remember as being worst at it, when they joined.