Knowing the rules, as in knowing English grammar, is a petty task. It's especially arbitrary to need to show it through fame. And as you should know, the merits of artistic works don't ride on their author's fame or history. You're conflating your own concerns over the sanctity of language with the mission of an artistic work. Ignoring unsavory aspects of reality is absolutely not the mission of art, so attacking the work on those grounds is pretty futile.
I did a quick academic literature search for how IM affects literature. Interesting results. It appears that lots of IM and texting give kids more confidence in writing, increases their vocabulary and (surprisingly) spelling skills, but that it decreases reading comprehension and the ability to distinguish non-standard from standard English. Mixed results, it seems.