1. How does your brain contain all this?
2. I am interpreting what you said (in part) as this:
Very much reminds me of Bakhtin and the heteroglossia of languages, wherein any given word or phrase is altered in time through usage by the social groups, professions, political factions etc. that use it. Of course, Bakhtin was referring to how words even in their standard notations (he was speaking of how social identities are manipulated in novels, so his theory pertains very much to writing as well as speech) are inflected with social variations, for example, the words "far out" have connotations that are specific to the context as well as the "socio-ideology" of the person that uses them, but I totally understand that text speak has the potential to work in this way since those forms of notation are characteristic of particualar social denominations.
The problem is, as with pretty much everything; It's a hate/ lazyness thing. I think we pretty much hate it by way of the kind of people we percieve it as being associated with, and also because whenever you see it on screen, it looks so counter intuitive, and you have to consciously decipher it, rather than the way in which our brain processes the notations that we're already familiar with. There was a great and really accessible piece Jonah Lehrer wrote recently about the process of mental "chunking," which, applied to language, in his own words, is:
"While reading this sentence, your brain is effortlessly chunking the letters, grouping the symbols into lumps of meaning. As a result, you don’t have to sound out each syllable, or analyze the phonetics; your literate brain is able to skip that stage of perception. This is what expertise is: the ability to rely on learned patterns to compensate for the inherent limitations of information processing in the brain."
This intuitive process, for people that don't use text speak, is basically epicly sharted on when reading text speak, and leads to no small amount of annoyance. It's similiar to the way in which the brain gets annoyed at music which contains rhythmic patterns that it cannot predict.
What is funny is that (and I'm generalising here) a lot of people who dislike text speak are the same people that tend to speak for individuality and expressionism.
Either way, I still hate txt spk. Because I'm a curmudgeonly fuck.