Love 'em, archaic linguistic forms and all. Being a prescriptivist, or what I prefer to identify as “prescriptivism-positive”, doesn’t mean that you have to be ignorant or intolerant of the natural evolution of language from a previous “standard” form to a current “standard” form.
I also enjoy reading well-written dialogue in so-called “textspeak”, even though it’s very different from formal written modern English, and all sorts of other historical and contemporary dialects as well. Yes, formal modern written English should follow the current rules of orthography and grammar. But not everything has to be formal modern written English.
What the posturing anti-prescriptivists generally fail to realize is that prescriptivism itself is also part of the natural evolution of language. That “skin crawling” feeling of “something ain’t right” when you encounter usage that doesn’t follow the conventions of the dialect the speaker is using is just as natural and legitimate as the constant experimentation with those conventions. It’s part of the natural selection process that makes linguistic evolution slower and more stable, instead of a perpetual burst of mutually incomprehensible mutations.
And that instinctive “something ain’t right” response is a natural response to nonstandard usage in any dialect, not just a formal written one. It applies to a sentence like “I ain’t saying what he hath done was smart” just as much as to a sentence like “The competitors took they’re places in the starting gates”.
The whole process of linguistic evolution is some of those usage mutations surviving the natural impulse of prescriptivist rejection until they actually manage to change our prescriptivist expectations, while many other usage mutations remain “errors” because the rejection impulse is too strong for them.