There's always going to be dumb people, I see them everyday.
I personally use "text language" with my friends, and I don't think I'm dumb, hopefully you guys don't think I'm dumb either. But if I started to use SAT vocabulary word with my friends, I doubt I would have any friends after a week.
On the other hand, I'm not going to use text language on this forum, because I know my audience are *mostly* mature/well educated people.
A few of my friends are very smart, smarter than me, but they can't seem to know when to use the proper style of speaking/writing. And besides, it's high school, which is more or less a joke (excluding SATs), when college comes, I'm sure the smart and the dumb are going to be weeded out, and the smart-but-still-act-dumb people (like the friends I described), are going to learn the proper way to present themselves, and everything will be sorted out.