I make a distinction for the context of the writing. Writing on a thread is "throw away" crap. Just try to keep it intelligible.
I find the creative ways younger guys have found to speed up writing via a keyboard interesting. Altho the total lack of caps and periods can be a bit too much because it really burdens the reader to figure out what is being said.
Before becoming a Grammar Nazi read this book or someone may just clean your clock for you.http://www.amazon.com/Our-Magnificent-Bastard-Tongue-English/dp/B002BWQ59K/ref=sr_1_1?ie=UTF8&s=books&qid=1287770382&sr=1-1Our Magnificent Bastard Tongue: The Untold Story of English
by John McWhorter (Author)
From Publishers Weekly
This evolutionary history of the English language from author and editor McWhorter (The Power of Babel: A Natural History of Language) isn't an easy read, but those fascinated by words and grammar will find it informative, provocative and even invigorating. McWhorter's history takes on some old mysteries and widely-believed theories, mounting a solid argument for the Celtic influence on English language that literary research has for years dismissed; he also patiently explains such drastic changes as the shift from Old English to Middle English (the differences between written and spoken language explain a lot). Those who have learned English as a second language will recognize McWhorter's assertion that "English really is easy(-ish) at first and hard later"; for that, he says, we can "blame... the Danish and Scandinavian" influence. McWhorter further proves his bona fides with deft analogies, like a comparison between the evolution of English and popping a wheelie on a bicycle; he also debunks, handily, the popular notion that "a language's grammar and the way its words pattern reflect aspects of its speakers' culture and the way they think." McWhorter's iconoclastic impulses and refreshing enthusiasm makes this worth a look for anyone with a love for the language.